This Tutorial in Hindi by Jagvinder Thind explains How to Activate and Suspend Database Copy, changing Activation Preference Number in Database Availability Groups DAG i Exchange Server 2010 in hindi. exchange server 2010 training. A database availability group (DAG) is the base component of the high availability built into Microsoft Exchange Server 2010. A DAG is a group of up to 16 Mailbox servers that hosts a set of databases and provides automatic database-level recovery from failures that affect individual servers or databases.
