Move MailBox Issue at Exchange 2010

Lucky Tham
Lucky Tham used Ask the Experts™

When i move this user mailbox from db1 to db4 which encountered this error:

Property expression ‘user1’ isn’t valid values are: Strings that includes @, cannot be the last character


1. Checked user at AD and confirmed no space and invalid character
2. Checked ADSI Edit > OU=OP > OU=Mail > CN=user1 no invlid character
3. Checked user can login to the outlook and OWA without any issue like file corruption

How to troubleshooting and can move user mailbox without this issue.

If need to run powershell, can i understand where to run it and what will be the easy command for me that never used powershell. Run In exchange 2010 or PC with Powershell login with import-module.  


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What is the value of the mailbox's userPrincipalName?  Try exporting all AD attributes to see if you can find the culprit:

Get-ADUser <sAMAccountName> -Properties *

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Lucky ThamFreelancer



Get-ADUser <sAMAccountName> -Properties *
At line:1 char:12
+ Get-ADUser <sAMAccountName> -Properties *
+            ~
The '<' operator is reserved for future use.
    + CategoryInfo          : ParserError: (:) [], ParentContainsErrorRecordEx
    + FullyQualifiedErrorId : RedirectionNotSupported

 Get-ADUser <sAMAccountName> -Properties *

Use the User1 name <SamaccountName> filed as suggested by Jason.

Get-ADUser <sAMAccountName> -Properties *

For Example for user1

Get-ADUser user1 -Properties
Hasin Ahmed ChoudharyExchange Administrator

Check the UPN value of that mailbox from ADUC.  If it is blank then above error is obvious.

I apologize I should have been more clear.  Please remove the <> from the sAMAccountName value when running the Get-ADUser cmdlet.

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