Problems With Exchange   Setup.com /PrepareAD

Hello,   For some reason the System Mailboxes are missing from my Exchange 2010 SP3 system, running on Windows Server 2012.
This was discovered while running a "new-MailboxRepairRequest" to detect problems on the mailbox database thought to be causing mailbox export errors and mailbox database backup errors.   The new-MailboxRepairRequest failed indicating the DiscoverySearchMailbox was missing.  Further research indicated it was present, but the 2 System Mailboxes were missing.  The "fix" was to run SETUP.COM /PrepareAD   which would recreate the missing mailboxes.   I tried this on 2 different Exchange Servers with this same error:

C:\Exchange2010SP3>c:\Exchange2010SP3\setup.com /PrepareAD

Welcome to Microsoft Exchange Server 2010 Unattended Setup

Preparing Exchange Setup

    Copying Setup Files                           COMPLETED

No server roles will be installed

Performing Microsoft Exchange Server Prerequisite Check

    Organization Checks                                       COMPLETED

Configuring Microsoft Exchange Server

    Organization Preparation                                  FAILED
     The following error was generated when "$error.Clear();
        buildToBuildUpgrade-ExsetDataAtom -AtomName OrgLevelCt -DomainController
 $RoleDomainController

" was run: "An error occurred with error code '3221684226' and message 'The syst
em cannot find the file specified.'.".

Here is the actual log entry for the error:

[04/07/2015 14:08:56.0805] [2] Creating Microsoft Exchange organization
[04/07/2015 14:08:56.0805] [2] Entering CAtomOrgLevelCt::ScCreateOrgCT
[04/07/2015 14:08:56.0805] [2] Leaving CAtomOrgLevelCt::ScCreateOrgCT
[04/07/2015 14:08:56.0805] [2] Entering ScHavePermissionToCreateDSObject
[04/07/2015 14:08:56.0805] [2]  Status code check (f:\14.03.0123\sources\dev\admin\src\libs\ds\x_dob.cxx:3370)
           Error code 0X8000500D (20493): This property can't be found in the cache.
[04/07/2015 14:08:56.0805] [2] Leaving ScHavePermissionToCreateDSObject
[04/07/2015 14:08:56.0805] [2] Configuring administrative rights
[04/07/2015 14:08:56.0805] [2] Entering ScInstallLDIFScript
[04/07/2015 14:08:56.0821] [2]  ScRunLDIFScript (f:\14.03.0123\sources\dev\admin\src\libs\exsetup\exmisc.cxx:891)
           Error code 0XC0070002 (2): The system cannot find the file specified.
[04/07/2015 14:08:56.0821] [2]  ScInstallLDIFScript (f:\14.03.0123\sources\dev\admin\src\libs\exsetup\server.cxx:152)
           Error code 0XC0070002 (2): The system cannot find the file specified.
[04/07/2015 14:08:56.0821] [2] Leaving ScInstallLDIFScript
[04/07/2015 14:08:56.0821] [2]  Status code check (f:\14.03.0123\sources\dev\admin\src\udog\exsetdata\components\server\a_orglevelct.cxx:264)
           Error code 0XC0070002 (2): The system cannot find the file specified.
[04/07/2015 14:08:56.0821] [2]  CAtomOrgLevelCt::ScAddDSObjects (f:\14.03.0123\sources\dev\admin\src\udog\exsetdata\components\server\a_orglevelct.cxx:381)
           Error code 0XC0070002 (2): The system cannot find the file specified.
[04/07/2015 14:08:56.0821] [2] Leaving CAtomOrgLevelCt::ScAddDSObjects
[04/07/2015 14:08:56.0821] [2]  CBaseAtom::ScRefreshDSObjects (f:\14.03.0123\sources\dev\admin\src\udog\setupbase\basecomp\baseatom.cxx:1478)
           Error code 0XC0070002 (2): The system cannot find the file specified.
[04/07/2015 14:08:56.0821] [2]  CAtomOrgLevelCt::ScReinstall (f:\14.03.0123\sources\dev\admin\src\udog\exsetdata\components\server\a_orglevelct.cxx:171)
           Error code 0XC0070002 (2): The system cannot find the file specified.
[04/07/2015 14:08:56.0821] [2] Leaving CAtomOrgLevelCt::ScReinstall
[04/07/2015 14:08:56.0821] [2] mode = 'Reinstall' (61955) CBaseAtom::ScSetup (f:\14.03.0123\sources\dev\admin\src\udog\setupbase\basecomp\baseatom.cxx:537)
           Error code 0XC0070002 (2): The system cannot find the file specified.
[04/07/2015 14:08:56.0821] [2]  ScSetupAtom (f:\14.03.0123\sources\dev\admin\src\udog\exsetdata\exsetds.cxx:882)
           Error code 0XC0070002 (2): The system cannot find the file specified.
[04/07/2015 14:08:56.0821] [2] Leaving ScSetupAtom
[04/07/2015 14:08:56.0836] [2] An error occurred with error code '3221684226' and message 'The system cannot find the file specified.'.
[04/07/2015 14:08:56.0852] [1] The following 1 error(s) occurred during task execution:
[04/07/2015 14:08:56.0852] [1] 0.  ErrorRecord: An error occurred with error code '3221684226' and message 'The system cannot find the file specified.'.
[04/07/2015 14:08:56.0852] [1] 0.  ErrorRecord: Microsoft.Exchange.Management.Deployment.ExsetdataException: An error occurred with error code '3221684226' and message 'The system cannot find the file specified.'.
[04/07/2015 14:08:56.0867] [1] The following error was generated when "$error.Clear();
      buildToBuildUpgrade-ExsetDataAtom -AtomName OrgLevelCt -DomainController $RoleDomainController

" was run: "An error occurred with error code '3221684226' and message 'The system cannot find the file specified.'.".
[04/07/2015 14:08:56.0867] [1] An error occurred with error code '3221684226' and message 'The system cannot find the file specified.'.
[04/07/2015 14:08:56.0867] [1] [ERROR-REFERENCE] Id=CommonGlobalConfig___a79d51e9e9424d53a462c1254e1ecece Component=EXCHANGE14:\Current\Release\Shared\Datacenter\Setup
[04/07/2015 14:08:56.0867] [1] Setup is stopping now because of one or more critical errors.
[04/07/2015 14:08:56.0867] [1] Finished executing component tasks.
[04/07/2015 14:08:56.0883] [1] Ending processing Install-ExchangeOrganization
[04/07/2015 14:08:56.0883] [0] The Exchange Server setup operation didn't complete.  More details can be found in ExchangeSetup.log located in the <SystemDrive>:\ExchangeSetupLogs folder.
[04/07/2015 14:08:56.0899] [0] End of Setup
[04/07/2015 14:08:56.0899] [0] **********************************************

Needless to say, further research has not yielded a resolution.   Need assistance.  Please advise.  Thanks.