- You have a mailbox server that is a member of a Database Availability Group (DAG) in a Microsoft Exchange Server 2010 Service Pack 1 (SP1) environment.
- The Exchange Information Store service (Store.exe) is running on the mailbox server.
- The mailbox server hosts the active copy of the mailbox database.
- You try to unmount the active copy of the mailbox database.
Article ID: 2497682 - Last Review: Apr 6, 2011 - Revision: 1