When the Exchange Store Manager of Groupwise Store manager is trying to process a mailbox you recieve the following error in the log
System.Data.SqlClient.SqlException (0x80131904): Time-out occurred while waiting for buffer latch type 2 for page (3:52781168), database ID 7
Currently the resolution is to reboot the SQL server or restart the SQL server service.
Issue is not reproducible and root cause has not been discovered yet.