Dealing with MAPI ‘OpenMsgStore' error in Exchange
Above measures might help you in tackling 'OpenMsgStore' error and would restore Exchange
. If not, then use efficient Exchange Server recovery software to restore Exchange database file and to access the emails as normal before. Restore Exchange tool scans the corrupt database and repairs the same efficiently and effectively. Other disaster like Exchange Server abnormally termination and inability of mounting the database on Exchange Server, etc. are all tackled with Exchange Restore tool.