We have a hybrid configuration with our on-premises Exchange 2010 server and our Office 365 Exchange Online server (if this should be posted in the Exchange 2010 forum instead, let me know, but I figured we have one of each).  We have been doing remote moves, and all but two of them are finished. The two remaining are refusing to go, and I've done extensive searching but haven't been able to resolve the issues.

The first mailbox returns this error message:

Error: MissingExchangeGuidException: The user object for nnn does not have a valid ExchangeGuid property and cannot be migrated.

The second mailbox returns this error message:

Error: MigrationTransientException: Couldn't find a move request that corresponds to the specified identity <identity>.

We've tried moving both mailboxes several times (deleting the migration batch after each error) with no luck.   The migration for both of these users are being done as separate batches with one user in each batch.  They are being created via the Exchange Admin Center from the Office 365 admin portal.  Any suggestions on what to do next?

• Edited by Dave Morgan (K) Thursday, April 02, 2015 8:28 PM

Could you please share the steps you have followed to achieve this task ?

Also, for only two remaining mailboxes, you can export into pst and import them to Office 365.

To make this task more easier, you may consider on this automated solution (http://www.exchangemigrationtool.com/) that could be a good alternative solution for you.

Do the migration step by step in the following article:

https://technet.microsoft.com/en-us/library/jj906432(v=exchg.150).aspx

Hi Dave,

I have gone thorough your query, its ok. Pplease follow this informative article that provides the steps Mailbox Migration to Exchange Online : https://technet.microsoft.com/en-us/library/jj863291%28v=exchg.150%29.aspx

In addition if you want to move mailboxes automatically you may also have a look on Lepide Exchange Recovery Manager that could be a good alternative solution for you.

It is complete disaster recovery, backup restoration, and Exchange to Exchange or Exchange to Office 365 migration tool and one stop solution.

I ended up opening a support case with Microsoft and they helped me resolve both issues.