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[***] 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.

<TABLE>
<S>                                                   <C>
COMMVAULT SYSTEMS INC.                                DELL PRODUCTS L. P.

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

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
      --------------------------------------                --------------------------------------
</TABLE>

                                     Page 1
<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            WINDOWS/LINUX/NETWARE Media Agent          $ [***]          $ [***]         $ [***]       $ [***]
                (SAN or LAN) with 1 OS IDA

SKU3            LAN Drive Pack with SLMS (per drive)       $ [***]          $ [***]         $ [***]       $ [***]

SKU4            SAN Drive Pack with DDS and SLMS (per      $ [***]          $ [***]         $ [***]       $ [***]
                drive)

SKU5            OS IDA WINDOWS/NETWARE/LINUX               $ [***]          $ [***]         $ [***]       $ [***]

SKU6            Application IDA WINDOWS                    $ [***]          $ [***]         $ [***]       $ [***]

SKU7            OS IDA UNIX                                $ [***]          $ [***]         $ [***]       $ [***]

SKU8            Tier I UNIX Media Agent (SAN or LAN)       $ [***]          $ [***]         $ [***]       $ [***]
                with 1 OS IDA

SKU9            Tier 2 UNIX Media Agent (SAN or LAN)       $ [***]          $ [***]         $ [***]       $ [***]
                with 1 OS IDA

SKU10           Tier 1 Application IDA UNIX                $ [***]          $ [***]         $ [***]       $ [***]

SKU11           Tier 2 Application IDA UNIX                $ [***]          $ [***]         $ [***]       $ [***]

SKU12           Upgrade key to unlock Galaxy Express       $ [***]          $ [***]         $ [***]       $ [***]
                to Galaxy

SKU13           Full Advance Features Pack (AFP)           $ [***]          $ [***]         $ [***]       $ [***]
                Upgrade to CommCell Bundle

SKU14           AFP Bundle Upgrade for Media Agent         $ [***]          $ [***]         $ [***]       $ [***]

SKU15           Gridstor for CommServe                     $ [***]          $ [***]         $ [***]       $ [***]

SKU16           Gridstor for Media Agent                   $ [***]          $ [***]         $ [***]       $ [***]

SKU17           Vault Tracker for CommServe                $ [***]          $ [***]         $ [***]       $ [***]

SKU18           Vault Tracker for Media Agent              $ [***]          $ [***]         $ [***]       $ [***]

SKU19           Data Migrator for Windows 1 CPU            $ [***]          $ [***]         $ [***]       $ [***]

SKU20           Data Migrator for Windows 2+ CPU           $ [***]          $ [***]         $ [***]       $ [***]

SKU21           Extended WORM Support                      $ [***]          $ [***]         $ [***]       $ [***]

SKU22           Qsnap Open File for                        $ [***]          $ [***]         $ [***]       $ [***]
                Windows/Linux/Solaris

SKU23           Virtual Machine IDA (for Vmware or         $ [***]          $ [***]         $ [***]       $ [***]
                MSFT Virtual Machine)

SKU24           NDMP Agent 6TB                             $ [***]          $ [***]         $ [***]       $ [***]

SKU25           Direct to Disk Option (DDO) 800GB          $ [***]          $ [***]         $ [***]       $ [***]

SKU26           One Touch Server                           $ [***]          $ [***]         $ [***]       $ [***]

SKU27           One Touch Client                           $ [***]          $ [***]         $ [***]       $ [***]

SKU28           DataMigrator for Exchange                  $ [***]          $ [***]         $ [***]       $ [***]

SKU29           DM for Exchange CAL Basic                  $ [***]          $ [***]         $ [***]       $ [***]

SKU30           DataArchiver for Exchange                  $ [***]          $ [***]         $ [***]       $ [***]

SKU31           DM/DA for Exchange CAL ADVANCED            $ [***]          $ [***]         $ [***]       $ [***]

SKU32           Dell Maintenance -- $1 SKU                 $ [***]             [***]           [***]      $ [***]

SKU33           Dell Maintenance -- $10 SKU                $ [***]             [***]           [***]      $ [***]

SKU34           Dell Maintenance -- $100 SKU               $ [***]             [***]           [***]      $ [***]

SKU35           Dell Maintenance -- $1000 SKU              $ [***]             [***]           [***]      $ [***]
</TABLE>

                                     Page 2
<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 3<PAGE>

                                                          CONFIDENTIAL TREATMENT
[***] 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 AMENDED AND RESTATED 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 effective as of 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 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.

         7.       All Products will be subject to CommVault's MSRP in effect as
                  of April 6, 2005.

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 (the
"Agreement").

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

/s/ Michael P. Owens                                    /s/ Warren H. Mondschein
------------------------------------                    ------------------------
Signature                                               Signature

Michael P. Owens                                        Warren H. Mondschein
------------------------------------                    ------------------------
Name                                                    Name

Sr. Mgr, SW Procurement                                 VP & General Counsel
------------------------------------                    ------------------------
Title                                                   Title

9/14/06                                                 9/14/06
------------------------------------                    ------------------------
Date                                                    Date

                                                                          Page 2

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