12 February 2015

Microsoft Exchange 2013 - Outlook connection problem after mailbox migration


Symptoms:

After an Exchange 2010 to Exchange 2013 successful mailbox migration the Outlook client hangs or display the disconnected status.

The Outlook connection status (Ctrl + Right click on Outlook icon on the task-bar) display a pending connection to the old Exchange server.

Creating a new Outlook profile to test the mailbox access returns the following error message:

The name cannot be resolved. The connection to Microsoft Exchange is unavailable. Outlook must be online or connected to complete this action.



Solution:

Temporarily disable the Internet Explorer proxy settings or add a proxy exclusion for the exchange server name.



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