Exchange Migration 2010 to 2013 prepare mailbox

Hello everyone.
we are migrating users a (cross-forest) scenario using FIM and ADMT.
moving the users and computers is working fine. synchronization between forests is working fine also as I can see 2010 mailboxes in exchange 2013 GAL as contacts. the issue appeared when I Ran the preparation command :
.\Prepare-MoveRequest.ps1 -Identity migtest@domain1.loc -Remote ForestDomainController DC.domain1.loc -RemoteForestCredential $Remote -LocalForestCredential $Local -LocalForestDomainController dc.domain2.local -UseLocalObject

and the error looks like this :
C:\Program Files\Microsoft\Exchange Server\V15\Scripts\Prepare-MoveRequest.ps1 : Error looking up source MBX
migtest@domain1.loc in source forest.
At line:1 char:1
+ .\Prepare-MoveRequest.ps1 -Identity migtest@domain1.loc -RemoteForestDomainControll ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (:) [Write-Error], WriteErrorException
    + FullyQualifiedErrorId : Microsoft.PowerShell.Commands.WriteErrorException,Prepare-MoveRequest.ps1

0 mailbox(s) ready to move.

your help is highly appreciated..
thanks in advance.
LVL 1
csh2010Asked:
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amit_gokharuCommented:
Check if  msExchMailboxGUID and PrimarySMTPAddress at the target is same and go through the articles below:
http://technet.microsoft.com/en-us/library/ee861103.aspx
http://blogs.technet.com/b/exchange/archive/2010/08/10/3410619.aspx

I would also try with mail enabled user. Let me know how you get on with it.
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csh2010Author Commented:
Dear Amit
I'm already aware of the links you provided me.
the issue is related to the source MBX thank you for your help.
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bhupenderccnaCommented:
Hello,

Have you checked with integrity check on source MBX for any error??

I am sure about to follow road-map for Cross forest migration provided by Microsoft please check carefully if in between you are missing something.

Thanks!
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