Outlook client remains disconnected after the mailbox is migrated to Exchange Server 2013

Applies to: Exchange Server 2013 Enterprise

Symptoms


Assume that you migrate a mailbox from Microsoft Exchange Server 2010 to Exchange Server 2013. However, the Outlook client remains disconnected for about 1–2 hours after the mailbox is successfully migrated.

Afterward, the client connects automatically without the need for any changes.

Note If you recycle the Exchange Server 2013 AutoDiscover Application Pool right after the move is complete, Outlook connects as expected.

Cause


This issue occurs because of the AutoDiscover application pool database cache refresh interval is 24 hours.

Note After you apply this cumulative update, the database cache interval is set to 1 hour by default.

Resolution


To resolve this issue, install Cumulative Update 13 for Exchange Server 2013 or a later cumulative update for Exchange Server 2013

Workaround


To work around this issue, recycle the Exchange 2013 AutoDiscover Application Pool right after you migrate the mailbox.

Status


Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

References


Learn about the terminology that Microsoft uses to describe software updates.