Problem:
POWERSHELL
Test-Mailflow
cmd fails in Exchange 2010 with the bellow error.
[Microsoft.Mapi.MapiExceptionRecoveryMDBMismatch]: MapiExceptionRecoveryMDBMismatch: Unable to open message store. (hr=0x80004005, ec=1165)
Resolutions:
This issue was resolved after dismounting the RDB (Recovery Database) on the effected Server.