after migrating a few users to ex2013 their clients have 8e758aef-9c56-4f46-ab64-4a46a72f0f08 in the server name field. creating a new profile does not fix either.

most of them are connecting to the server but it odd to see that instead of true name.

Hello

its normal.

http://blogs.technet.com/b/exchange/archive/2013/01/25/exchange-2013-client-access-server-role.aspx

Hello,

Its by designed in Exchange 2013. It will benefit for some Outlook hot issue like Administrator has made a change on your Outlook client, please restart.

Thanks,

Please remember to mark the replies as answers if they help and unmark them if they provide no help. If you have feedback for TechNet Subscriber Support, contact tnmff@microsoft.com