Document:

<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 10.22

                                  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
   ---------------------------------------   ----------------------------------

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

Confidential                             Page 1

<PAGE>

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

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

Confidential                             Page 2

<PAGE>

                                    EXHIBIT B
                               PRICING SUPPLEMENT
                        TO THE SOFTWARE LICENSE AGREEMENT
                           BETWEEN DELL PRODUCTS L.P.
                           AND COMMVAULT SYSTEMS INC.
<TABLE>
<CAPTION>
                                  FULL GALAXY

                                           1yr update
DELL                                    protection includes   Enhanced
SKU    SKU DESCRIPTION   Dell SW Cost     L2/L3 Support        Support   Total COGS
-----  ---------------   ------------   -------------------   --------   ----------
<S>    <C>               <C>            <C>                   <C>        <C>
SKU1      [***]            $ [***]          $ [***]           $ [***]     $ [***]
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>

Confidential                             Page 3

<PAGE>

<TABLE>
<CAPTION>
                                 GALAXY EXPRESS

                                           1yr update
                                           protection
DELL                                      includes L2/L3
SKU    SKU DESCRIPTION   Dell SW Cost         Support         Enhanced   Total COGS
-----  ---------------   ------------   -------------------   --------   ----------
<S>    <C>               <C>            <C>                   <C>        <C>
SKU36    [***]             $ [***]            $ [***]          $ [***]    $ [***]
SKU37    [***]             $ [***]            $ [***]          $ [***]    $ [***]
SKU38    [***]             $ [***]            $ [***]          $ [***]    $ [***]
SKU39    [***]             $ [***]            $ [***]          $ [***]    $ [***]
SKU40    [***]             $ [***]            $ [***]          $ [***]    $ [***]
SKU41    [***]             $ [***]            $ [***]          $ [***]    $ [***]
</TABLE>

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

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     [***]         [***]

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     [***]         [***]

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     [***]         [***]

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

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     [***]         [***]

A0131125     [***]         [***]
A0119479     [***]         [***]
A0119478     [***]         [***]
A0119477     [***]         [***]
A0131124     [***]         [***]
A0119476     [***]         [***]
A0119475     [***]         [***]
A0119491     [***]         [***]

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     [***]         [***]

A0243384     [***]         [***]
A0118273     [***]         [***]
A0118275     [***]         [***]
</TABLE>

                                                                          Page 7

<PAGE>

<TABLE>
<S>        <C>            <C>
A0118281     [***]         [***]
A0118295     [***]         [***]
A0118297     [***]         [***]
A0118298     [***]         [***]
A0290530     [***]         [***]
A0290531     [***]         [***]
A0290532     [***]         [***]
A0290533     [***]         [***]

A0118284     [***]         [***]
A0118285     [***]         [***]
A0118289     [***]         [***]
A0118291     [***]         [***]

A0243376     [***]         [***]
A0243377     [***]         [***]
A0243378     [***]         [***]
A0243379     [***]         [***]

A0243373     [***]         [***]
A0243374     [***]         [***]
A0243375     [***]         [***]
A0243359     [***]         [***]
A0243360     [***]         [***]

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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