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Exchange  user domain name is locked in

Posted on 2014-10-01
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Last Modified: 2014-10-03
We have an Exchange 2010 server, and we need to change a user's domain name from a company we acquired, to our own company domain.  This user has been running with his old company domain of XX.com, and now we want to change him to show as ZZ.com.  In spite of successfully changing the Primary SMTP address in the Exchange Console, when we resolve his name in Outlook 2010, he comes up as his old domain of XX.com.  It seems like it's "embedded" somehow in the system somewhere.
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Question by:Damian_Gardner
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Gareth Gudger earned 500 total points
ID: 40355854
Couple of possibilities.

You are in Cached mode and the Offline Address Book hasn't picked up the changes yet. By default, this can take up to 24 hours. The easiest way to test is to log into Outlook Web App instead and see if he appears correctly.

Secondly, everyone has his old email address cached in their To: field. The easiest way to test is to start typing his name into the To: field. Then hit the down arrow to select and the delete key to remove whatever cached suggestions Outlook may still have. Then click on the To: button itself (not the field) and select his name from the Global Address List/Address Book.
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by:Damian_Gardner
ID: 40357126
Gareth - thanks and let me check these.  I did think about the TO field caching, and deleted the entry in my own Outlook to test it.  What I did after that was to type the user's alias in the to field and let it resolve it, which it then resolved incorrectly to the old domain name.  My Outlook is in cached mode, however.  Standby
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