In Exchange 2007 and earlier version of Exchange if you wanted to enable or disable circular logging then you should dismount and mount the database to bring this into effect. In Exchange 2010 if you enable or disable circular logging then this chance will come into effect with in 30 seconds. This is done with the help of replication service and you dont have to dismount and mount the active database to get this changes applied. I think this is cool. You can make the changes on the fly without disrupting the mailbox live users.

Enable circular logging on a Particular databaseGet-mailboxdatabase -Identity DBname | set-mailboxdatabase -CircularloggingEnabled $trueDisable circular logging on a Particular databaseGet-mailboxdatabase -Identity DBname | set-mailboxdatabase -CircularloggingEnabled $falseEnable Circular logging on all the Database in a perticular DAGGet-mailboxdatabase -identity DAGname* | set-mailboxdatabase -CircularloggingEnabled $trueDisable Circular logging on all the database in a perticular DAGGet-mailboxdatabase -identity DAGname* | set-mailboxdatabase -CircularloggingEnabled $false

Feeling nice to blog after a long time on a auspecious day 🙂