Document:

<PAGE>

                                                                   EXHIBIT 10.22

[***] INDICATES THAT TEXT HAS BEEN OMITTED WHICH IS THE SUBJECT OF A
CONFIDENTIAL TREATMENT REQUEST. THIS TEXT HAS BEEN FILED SEPARATELY WITH THE
SEC.

                                  ADDENDUM FIVE
                                     TO THE
                       LICENSE AND DISTRIBUTION AGREEMENT
                                     BETWEEN
                               DELL PRODUCTS L.P.
                                       AND
                             COMMVAULT SYSTEMS, INC.

This Addendum ("Addendum") to the Software License Agreement dated December 17,
2003 (the "Agreement"), is entered into by and between Dell Products L.P.
(hereinafter "Dell") with its principal place of business at One Dell Way, Round
Rock, Texas 78682, and CommVault Systems, Inc., (hereinafter "CommVault") a
Delaware corporation having a principal place of business at 2 Crescent Place,
Oceanport, New Jersey 07757 (hereinafter "Licensor") and is effective as of the
23rd day of May, 2006 (the "Effective Date")

                                    RECITALS

WHEREAS, CommVault and Dell entered into the Agreement through which COMMVAULT
granted Dell various rights to distribute certain CommVault software products;

WHEREAS, CommVault and Dell wish to amend the Agreement and replace all Pricing
Supplements previously agreed to and attached to the Agreements, including the
initial Pricing Supplement, and as Addendum #1 dated April 26, 2004, Addendum #2
dated October 30, 2004, Addendum #3 dated May 1, 2005, and Addendum #4 dated
November 15, 2005.

NOW THEREFORE, in consideration of the mutual covenants and promises set forth
herein and for other good and valuable consideration, the receipt of which both
parties hereby acknowledge, Dell and CommVault agree as follows:

Any capitalized terms defined in this Addendum are specific to this Addendum
only, and do not modify or change the meaning set forth in the Agreement. Unless
expressly defined in this Addendum, the capitalized terms in this Addendum are
as defined in the Agreement. The Agreement shall remain in full force and effect
except as supplemented and amended herein.

1.       Any and all Pricing Supplements to the Agreement are hereby replaced in
         its entirety with the attached Exhibit B to this Addendum.

2.       [***].

3.       Due in part to the [***] efforts undertaken by CommVault, the
         provisions of Section 13.5 of the Agreement shall no longer apply, and
         Section 13.5 shall hereinafter be deleted in its entirety for the sole
         purpose of this Addendum. This paragraph 3 does not amend the Agreement
         for subsequent addenda.

No other changes or modification are intended by this Addendum. All other terms
and conditions of the Agreement are in effect.

IN WITNESS WHEREOF, the parties have executed this Addendum by their duly
authorized representatives as of the date first set forth above.

COMMVAULT SYSTEMS INC.                        DELL PRODUCTS L. P.

By: /s/ David R. West                         By: /s/ Joseph Kanicki
   ---------------------------------------        ------------------------------

                                     Page 1

<PAGE>

Name: David R. West                           Name: Joseph Kanicki
      ------------------------------------          ----------------------------

Title: VP Marketing & Business Development    Title: Senior Manager, Dell, Inc.
       -----------------------------------           ---------------------------

Date: 5/22/06                                 Date: 6/6/2006
      ------------------------------------          ----------------------------

                                     Page 2

<PAGE>

                                    EXHIBIT B
                               PRICING SUPPLEMENT
                        TO THE SOFTWARE LICENSE AGREEMENT
                           BETWEEN DELL PRODUCTS L.P.
                           AND COMMVAULT SYSTEMS INC.

                                   FULL GALAXY

<TABLE>
<CAPTION>
                                                                           1yr update
                                                                           protection
DELL                                                                     includes L2/L3    Enhanced
SKU             SKU DESCRIPTION                          Dell SW Cost       Support         Support      Total COGS
---             ---------------                          ------------       -------         -------      ----------
<S>             <C>                                      <C>             <C>               <C>           <C>
SKU1            CommServe                                  $ [***]          $ [***]         $ [***]       $ [***]
SKU2            [***]                                      $ [***]          $ [***]         $ [***]       $ [***]
SKU3            [***]                                      $ [***]          $ [***]         $ [***]       $ [***]
SKU4            [***]                                      $ [***]          $ [***]         $ [***]       $ [***]
SKU5            [***]                                      $ [***]          $ [***]         $ [***]       $ [***]
SKU6            [***]                                      $ [***]          $ [***]         $ [***]       $ [***]
SKU7            [***]                                      $ [***]          $ [***]         $ [***]       $ [***]
SKU8            [***]                                      $ [***]          $ [***]         $ [***]       $ [***]
SKU9            [***]                                      $ [***]          $ [***]         $ [***]       $ [***]
SKU10           [***]                                      $ [***]          $ [***]         $ [***]       $ [***]
SKU11           [***]                                      $ [***]          $ [***]         $ [***]       $ [***]
SKU12           [***]                                      $ [***]          $ [***]         $ [***]       $ [***]
SKU13           [***]                                      $ [***]          $ [***]         $ [***]       $ [***]
SKU14           [***]                                      $ [***]          $ [***]         $ [***]       $ [***]
SKU15           [***]                                      $ [***]          $ [***]         $ [***]       $ [***]
SKU16           [***]                                      $ [***]          $ [***]         $ [***]       $ [***]
SKU17           [***]                                      $ [***]          $ [***]         $ [***]       $ [***]
SKU18           [***]                                      $ [***]          $ [***]         $ [***]       $ [***]
SKU19           [***]                                      $ [***]          $ [***]         $ [***]       $ [***]
SKU20           [***]                                      $ [***]          $ [***]         $ [***]       $ [***]
SKU21           [***]                                      $ [***]          $ [***]         $ [***]       $ [***]
SKU22           [***]                                      $ [***]          $ [***]         $ [***]       $ [***]
SKU23           [***]                                      $ [***]          $ [***]         $ [***]       $ [***]
SKU24           [***]                                      $ [***]          $ [***]         $ [***]       $ [***]
SKU25           [***]                                      $ [***]          $ [***]         $ [***]       $ [***]
SKU26           [***]                                      $ [***]          $ [***]         $ [***]       $ [***]
SKU27           [***]                                      $ [***]          $ [***]         $ [***]       $ [***]
SKU28           [***]                                      $ [***]          $ [***]         $ [***]       $ [***]
SKU29           [***]                                      $ [***]          $ [***]         $ [***]       $ [***]
SKU30           [***]                                      $ [***]          $ [***]         $ [***]       $ [***]
SKU31           [***]                                      $ [***]          $ [***]         $ [***]       $ [***]
SKU32           [***]                                      $ [***]             [***]           [***]      $ [***]
SKU33           [***]                                      $ [***]             [***]           [***]      $ [***]
SKU34           [***]                                      $ [***]             [***]           [***]      $ [***]
SKU35           [***]                                      $ [***]             [***]           [***]      $ [***]
</TABLE>

                                     Page 3

<PAGE>

                                 GALAXY EXPRESS

<TABLE>
<CAPTION>
                                                                            1yr update
                                                                            protection
DELL                                                                         includes
SKU             SKU DESCRIPTION                            Dell SW Cost   L2/L3 Support    Enhanced      Total COGS
---             ---------------                            ------------   -------------    --------      ----------
<S>             <C>                                        <C>            <C>              <C>           <C>
SKU36           Galaxy Express Small Business Server         $ [***]         $ [***]        $ [***]       $ [***]
                Edition
                      1 Windows MediaAgent included
                      3 Application Agents included
                         (SQL, Exchange and Sharepoint
                      Single tape drive support (no
                         library support)
                      Includes 4 file system agents
                      Worm Support included
SKU37           Galaxy Express File Server Edition:          $ [***]         $ [***]        $ [***]       $ [***]
                      Galaxy Express (key code upgrade
                         capability to Galaxy)
                      1 Windows or Storage Server2003
                         MediaAgent included
                      Single tape drive support (no
                         library support)
                      Worm Support included Max 13 total
                         clients (agents)
                      Includes 4 file system agents
SKU38           Galaxy Express E-mail & Database Server      $ [***]         $ [***]        $ [***]       $ [***]
                Edition
                      1 Application Agent included
                         (Exchange, Notes, GroupWise,
                         SQL, SharePoint or Oracle)
                      Galaxy Express (key code upgrade
                         capability to Galaxy)
                      1 Windows, Storage Server2003,
                         Linux or Novell MediaAgent
                         included
                      Media Agent supports a maximum of
                         one, 2-drive library
                      Open file support included Worm
                         support included Max 15
                      total clients (agents)
                         inclusive of coupon for 1
                         Windows Application iDA
                      Includes 4 file system agents

SKU39           Galaxy Express OLBU - For Express only       $ [***]         $ [***]        $ [***]       $ [***]
SKU40           Galaxy Express Client Pack - for             $ [***]         $ [***]        $ [***]       $ [***]
                Express only
SKU41           Galaxy Express LAN Drive                     $ [***]         $ [***]        $ [***]       $ [***]
</TABLE>

                                     Page 4<PAGE>
[***] INDICATES THAT TEXT HAS BEEN OMITTED WHICH IS THE SUBJECT OF A
CONFIDENTIAL TREATMENT REQUEST. THIS TEXT HAS BEEN FILED SEPARATELY WITH THE
SEC.

                                                         EXHIBIT 10.23

                      COMMVAULT SYSTEMS RESELLER AGREEMENT

This Reseller Agreement is made as of the effective Date set forth below,
between CommVault Systems, 2 Crescent Place, Oceanport, New Jersey 07757
("CommVault") and Dell Inc, ("Reseller").

This agreement is entered into April 6, 2005.

WHEREAS, CommVault is engaged in the business of providing data storage
products.

WHEREAS, Reseller is a provider of information management solutions who wishes
to purchase software products from CommVault for the purposes of resale with
other products or services to customer in accordance with valid purchase orders.

THEREFORE, the parties agree as follows:

1.    Price: Reseller receives a [***] discount on the MSRP of the SW. Reseller
      shall provide CommVault with an applicable tax exemption certificate.
      Reseller has the unrestricted right to determine the prices at which it
      resells any Product to its customers. No CommVault representative has the
      authority to suggest that Reseller charge a particular resale price for
      any product.

2.    Purchase Orders: Reseller shall place purchase orders for software
      identified in exhibit 1 with CommVault through the Dell 3GFX order
      process. CommVault will accept or reject orders directly through the 3GFX
      system.

3.    Payment: CommVault will electronically invoice Reseller through the 3DFX
      process and payment for Products, including any authorized partial
      shipments, shall be due in [***] from the date that Dell receives the
      invoice.

4.    Rebate: CommVault will rebate the Reseller on select orders in the amount
      of [***] of the net S&P Software (SW licensing only). [***].

5.    Timeframe: This agreement will be in force from Feb 1, 2005 through July
      31, 2005. This agreement will be re-evaluated after each Dell Fiscal
      quarter and any changes will be made in writing and agreed to by both Dell
      and CommVault.

6.    Territory: United States only.

This agreement is intended to supersede any previous reseller agreements between
Dell and CommVault.

                                                                          Page 1
<PAGE>
(Continued from Page 1, CommVault Systems Reseller Agreement)

By signing below, the Reseller acknowledges that it has read, understands, and
agrees, to be bound by all terms and conditions of this Reseller Agreement,
including Exhibit 1 (together the "Agreement").

Dell, Inc.  ("Reseller")                         CommVault Systems
------------------------                         -----------------

/s/ Sean Cooper                                  /s/ David R. West
-----------------------------                    -------------------------------
Signature                                        Signature

Sean Cooper                                      David R. West
-----------------------------                    -------------------------------
Name                                             Name

Global Procurement                               VP Business Development
-----------------------------                    -------------------------------
Title                                            Title

4/25/05                                          4/19/05
-----------------------------                    -------------------------------
Date                                             Date

                                                                          Page 2
<PAGE>
                                    Exhibit 1

<Table>
<Caption>
DELL SKU       DESCRIPTION                                         MSRP/List
                                                                   Price
--------------------------------------------------------------------------------
<S>            <C>                                                 <C>
A0381892       [***]                                               [***]
A0131062       [***]                                               [***]
A0119474       [***]                                               [***]
A0119473       [***]                                               [***]
A0119472       [***]                                               [***]
A0146647       [***]                                               [***]
A0146646       [***]                                               [***]
A0143088       [***]                                               [***]
A0423903       [***]                                               [***]
A0422896       [***]                                               [***]
A0422908       [***]                                               [***]
A0422913       [***]                                               [***]
A0422916       [***]                                               [***]
A0429591       [***]                                               [***]
A0429592       [***]                                               [***]
</Table>

<Table>
<S>            <C>                                                 <C>
A0131061       [***]                                               [***]
A0119471       [***]                                               [***]
A0119470       [***]                                               [***]
A0119469       [***]                                               [***]
A0223647       [***]                                               [***]
A0223649       [***]                                               [***]
A0223651       [***]                                               [***]
A0223645       [***]                                               [***]
A0131067       [***]                                               [***]
A0119468       [***]                                               [***]
A0119467       [***]                                               [***]
A0119466       [***]                                               [***]
A0131060       [***]                                               [***]
A0119607       [***]                                               [***]
A0119606       [***]                                               [***]
A0119605       [***]                                               [***]
A0131059       [***]                                               [***]
A0119604       [***]                                               [***]
A0119603       [***]                                               [***]
A0119602       [***]                                               [***]
A0119600       [***]                                               [***]
A0119598       [***]                                               [***]
A0119596       [***]                                               [***]
</Table>

                                                                          Page 3
<PAGE>
<Table>
<S>            <C>                                                 <C>
A0131031       [***]                                               [***]
</Table>

<Table>
<S>            <C>                                                 <C>
A0131057       [***]                                               [***]
A0119588       [***]                                               [***]
A0119587       [***]                                               [***]
A0119586       [***]                                               [***]
A0225276       [***]                                               [***]
A0225277       [***]                                               [***]
A0225278       [***]                                               [***]
A0225279       [***]                                               [***]
A0131056       [***]                                               [***]
A0119585       [***]                                               [***]
A0119584       [***]                                               [***]
A0119583       [***]                                               [***]
A0131055       [***]                                               [***]
A0119582       [***]                                               [***]
A0119581       [***]                                               [***]
A0119579       [***]                                               [***]
A0131091       [***]                                               [***]
A0119577       [***]                                               [***]
A0119568       [***]                                               [***]
A0119567       [***]                                               [***]
A0168288       [***]                                               [***]
A0119566       [***]                                               [***]
A0119565       [***]                                               [***]
A0119564       [***]                                               [***]
A0131065       [***]                                               [***]
A0119563       [***]                                               [***]
A0119562       [***]                                               [***]
A0119561       [***]                                               [***]
</Table>

<Table>
<S>            <C>                                                 <C>
A0131100       [***]                                               [***]
A0131098       [***]                                               [***]
A0131096       [***]                                               [***]
A0131094       [***]                                               [***]
A0376336       [***]                                               [***]
A0223658       [***]                                               [***]
A0223660       [***]                                               [***]
A0389492       [***]                                               [***]
A0223662       [***]                                               [***]
A0223664       [***]                                               [***]
A0223666       [***]                                               [***]
A0423753       [***]                                               [***]
</Table>

                                                                          Page 4
<PAGE>
<Table>
<S>            <C>                                                 <C>
A0423758       [***]                                               [***]
A0423766       [***]                                               [***]
A0423777       [***]                                               [***]
A0423779       [***]                                               [***]
A0423785       [***]                                               [***]
</Table>

<Table>
<S>            <C>                                                 <C>
A0131064       [***]                                               [***]
A0119548       [***]                                               [***]
A0423915       [***]                                               [***]
A0131063       [***]                                               [***]
A0131085       [***]                                               [***]
A0131083       [***]                                               [***]
A0119543       [***]                                               [***]
A0131138       [***]                                               [***]
A0119539       [***]                                               [***]
A0131137       [***]                                               [***]
A0119527       [***]                                               [***]
A0131136       [***]                                               [***]
A0131135       [***]                                               [***]
A0119524       [***]                                               [***]
A0119523       [***]                                               [***]
A0131134       [***]                                               [***]
A0119519       [***]                                               [***]
A0152301       [***]                                               [***]
A0389497       [***]                                               [***]
A0389499       [***]                                               [***]
A0196063       [***]                                               [***]
A0196068       [***]                                               [***]
A0196072       [***]                                               [***]
A0196075       [***]                                               [***]
</Table>

<Table>
<S>            <C>                                                 <C>
A0131133       [***]                                               [***]
A0119517       [***]                                               [***]
A0119514       [***]                                               [***]
A0119513       [***]                                               [***]
A0131132       [***]                                               [***]
A0119512       [***]                                               [***]
A0119511       [***]                                               [***]
A0119510       [***]                                               [***]
A0274379       [***]                                               [***]
A0274380       [***]                                               [***]
A0274381       [***]                                               [***]
A0274382       [***]                                               [***]
</Table>

                                                                          Page 5
<PAGE>
<Table>
<S>            <C>                                                 <C>
A0131130       [***]                                               [***]
A0119509       [***]                                               [***]
A0119508       [***]                                               [***]
A0119507       [***]                                               [***]
A0433293       [***]                                               [***]
A0433286       [***]                                               [***]
A0433287       [***]                                               [***]
A0433288       [***]                                               [***]
A0131129       [***]                                               [***]
A0119506       [***]                                               [***]
A0119505       [***]                                               [***]
A0119504       [***]                                               [***]
A0131128       [***]                                               [***]
A0119503       [***]                                               [***]
A0119502       [***]                                               [***]
A0119483       [***]                                               [***]
A0164838       [***]                                               [***]
A0164840       [***]                                               [***]
A0164843       [***]                                               [***]
A0164846       [***]                                               [***]
A0131127       [***]                                               [***]
A0119482       [***]                                               [***]
A0119481       [***]                                               [***]
A0119480       [***]                                               [***]
A0132100       [***]                                               [***]
A0229777       [***]                                               [***]
</Table>

<Table>
<S>            <C>                                                 <C>
A0131125       [***]                                               [***]
A0119479       [***]                                               [***]
A0119478       [***]                                               [***]
A0119477       [***]                                               [***]
A0131124       [***]                                               [***]
A0119476       [***]                                               [***]
A0119475       [***]                                               [***]
A0119491       [***]                                               [***]
</Table>

<Table>
<S>            <C>                                                 <C>
A0379894       [***]                                               [***]
A0360825       [***]                                               [***]
A0219312       [***]                                               [***]
A0219313       [***]                                               [***]
A0219315       [***]                                               [***]
A0233016       [***]                                               [***]
A0233027       [***]                                               [***]
</Table>

                                                                          Page 6
<PAGE>
<Table>
<S>            <C>                                                 <C>
A0285833       [***]                                               [***]
A0285836       [***]                                               [***]
A0223244       [***]                                               [***]
A0223246       [***]                                               [***]
A0223248       [***]                                               [***]
A0223250       [***]                                               [***]
A0233823       [***]                                               [***]
A0168302       [***]                                               [***]
A0168303       [***]                                               [***]
A0168304       [***]                                               [***]
A0159672       [***]                                               [***]
A0159674       [***]                                               [***]
A0159676       [***]                                               [***]
A0347354       [***]                                               [***]
A0347404       [***]                                               [***]
A0347408       [***]                                               [***]
A0347415       [***]                                               [***]
A0227427       [***]                                               [***]
A0228533       [***]                                               [***]
A0227428       [***]                                               [***]
A0227429       [***]                                               [***]
A0131037       [***]                                               [***]
A0227433       [***]                                               [***]
A0227434       [***]                                               [***]
A0145629       [***]                                               [***]
A0229785       [***]                                               [***]
A0132655       [***]                                               [***]
A0229790       [***]                                               [***]
A0229791       [***]                                               [***]
A0229798       [***]                                               [***]
A0229800       [***]                                               [***]
A0229802       [***]                                               [***]
A0229804       [***]                                               [***]
A0143088       [***]                                               [***]
A0148854       [***]                                               [***]
A0148860       [***]                                               [***]
A0289610       [***]                                               [***]
A0289612       [***]                                               [***]
A0289614       [***]                                               [***]
A0244848       [***]                                               [***]
A0244976       [***]                                               [***]
</Table>

<Table>
<S>            <C>                                                 <C>
A0243384      [***]                                               [***]
A0118273      [***]                                               [***]
A0118275      [***]                                               [***]
</Table>

                                                                          Page 7
<PAGE>
<Table>
<S>            <C>                                                 <C>
A0118281       [***]                                               [***]
A0118295       [***]                                               [***]
A0118297       [***]                                               [***]
A0118298       [***]                                               [***]
A0290530       [***]                                               [***]
A0290531       [***]                                               [***]
A0290532       [***]                                               [***]
A0290533       [***]                                               [***]
</Table>

<Table>
<S>            <C>                                                 <C>
A0118284       [***]                                               [***]
A0118285       [***]                                               [***]
A0118289       [***]                                               [***]
A0118291       [***]                                               [***]
</Table>

<Table>
<S>            <C>                                                 <C>
A0243376       [***]                                               [***]
A0243377       [***]                                               [***]
A0243378       [***]                                               [***]
A0243379       [***]                                               [***]
</Table>

<Table>
<S>            <C>                                                 <C>
A0243373       [***]                                               [***]
A0243374       [***]                                               [***]
A0243375       [***]                                               [***]
A0243359       [***]                                               [***]
A0243360       [***]                                               [***]
</Table>

<Table>
<S>            <C>                                                 <C>
A0352266       [***]                                               [***]
A0352263       [***]                                               [***]
A0352264       [***]                                               [***]
A0352265       [***]                                               [***]
A0243056       [***]                                               [***]
A0243071       [***]                                               [***]
A0132297       [***]                                               [***]
A0131608       [***]                                               [***]
A0132299       [***]                                               [***]
A0131610       [***]                                               [***]
A0132298       [***]                                               [***]
A0131609       [***]                                               [***]
</Table>

                                                                          Page 8
<PAGE>
<Table>
<S>            <C>                                                 <C>
A0131434       [***]                                               [***]
A0131432       [***]                                               [***]
A0219317       [***]                                               [***]
A0219319       [***]                                               [***]
A0219321       [***]                                               [***]
A0219323       [***]                                               [***]
A0219325       [***]                                               [***]
A0219327       [***]                                               [***]
A0173058       [***]                                               [***]
A0173059       [***]                                               [***]
A0173060       [***]                                               [***]
A0173061       [***]                                               [***]
A0131438       [***]                                               [***]
</Table>

                                                                          Page 9

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