Event ID 4999 and Event ID 7031 are logged when you move a mailbox to an Exchange Server 2010 server

Applies to: Exchange Server 2010

Symptoms


When you try to move a mailbox from an earlier version of Exchange server to a Microsoft Exchange Server 2010 server, the operation fails. Additionally, you find the following events are logged on the Exchange Server 2010 server.

Cause


This problem occurs because a message in the effected mailbox misses a certain property.

Resolution


To resolve this problem, install the following update rollup:
982639 Description of Update Rollup 4 for Exchange Server 2010

Status


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