The critical property 'LegacyExchangeDN' is missing in the MailUser object

When performing a new-moverequest you receive the following error:

The critical property 'LegacyExchangeDN' is missing in the MailUser object 'migrateme3'.
+ CategoryInfo : InvalidArgument: (corp.dom/GALSync/FromILM/migrateme3:MailboxOrMailUser
IdParameter) [New
-MoveRequest], RecipientTaskException
+ FullyQualifiedErrorId : 9DC9C0BA,Microsoft.Exchange.Management.RecipientTasks
.NewMoveRequest


The issue is you used ADMT to migrate the user first then ran prepare-moverequest. The issue is that prepare-moverquest although says it is sucessful did not properly convert it into a mail enabled user. The script failed to stamp the legacyexchangeDN as well as the target address. If you manually add the legacyexchagneDN you then run into the error below:

Cannot find a recipient that has mailbox GUID 'f41a2905-8ea2-4ff3-a56f-4ed8739a2622'.
+ CategoryInfo : NotSpecified: (0:Int32) [New-MoveRequest], RemotePermanentException
+ FullyQualifiedErrorId : B5053E67,Microsoft.Exchange.Management.RecipientTasks.
NewMoveRequest

I'm still investigating this as prepare-moverequest is supposedly supported after Exchange 2010 SP1 with the overwritelocalobject parameter. The workaround in the meantime that I have if you want to use ADMT first:

1.Use ADMT to migrate all user accounts
2.Prepare-moverequest on all accounts (legacyexchangedn or targetaddress is still missing)
3.Use script to add targetaddress of mailnickname@company.com on all migrated accounts, I use admodify, but you can use powershell etc.
4.Update-recipient on all migrated accounts. This will stamp the legacyexchangedn
5.New-moverequest succeeds



James Chong
MCITP | EA | EMA; MCSE | M+, S+
Security+, Project+, ITIL
msexchangetips.blogspot.com