we have exchange 2010 system. 3 mailbox servers part of a DAG. I am trying to backup the active store using windows backup. it fails with the error:
event id 9814
An attempt to prepare the database 'ldn-umdb-01' for backup failed because the database is already in the process of being backed up. The error code is -2403. (Note that if a backup was recently aborted, then it may take several minutes for the system to detect the aborted backup and initiate backup cleanup procedures, so this message may be generated if an attempt was made to backup a database before a previous backup attempt had fully terminated.)
event id 9840
Exchange VSS Writer (instance 99f1458f-4c26-4ed9-94f2-2ef4a3923342:44) failed with error code -2403 when preparing the database engine for backup of database 'ldn-umdb-01'.