Dismount Mailbox Store/Database and change Mailbox Database properties
For MS Exchange 2010:
Note: Once the above-mentioned steps are executed, close the 'Exchange Management Console' before initiating the restore operation.
For MS Exchange 2007:
Note: Once the above-mentioned steps are executed, close the 'Exchange Management Console' before initiating the restore operation.
For MS Exchange Server 2003
Perform the steps ‘c’ and ‘d’, listed above for all the databases that need to be restored.
Note: Once the above-mentioned steps have been executed, close the 'MS Exchange System Manager' before initiating the restore operation.