You can't access a mailbox after you're migrated to Office 365 dedicated/ITAR (vNext)

Symptoms

Users can't access their mailboxes after they're migrated to Microsoft Office 365 dedicated/ITAR (vNext). 

Cause

This issue occurs because the data in old profiles prevents Outlook from connecting or because users are using an early version of Microsoft Outlook 2013. 

Resolution

To fix this issue, follow these steps:
  1. Run a repair of Office.
  2. Create a new profile (in addition to the original profile that can’t connect).
If the mailbox is confirmed to be accessed after a new profile is created, users can enable Outlook Troubleshooting Logging, and then log on by using the old profile. Let Outlook run for several minutes to capture the details about the behavior. 

Please also collect an OffCat log of the affected Outlook profile to provide together with the Outlook logging. You may submit a support incident online to Microsoft Online Services Support. Or, you can contact Microsoft Online Services Support by telephone .

More Information

There is a known access issue in early versions of Outlook 2013 .
Properties

Article ID: 3187401 - Last Review: Aug 21, 2016 - Revision: 1

Feedback