What is the be best practice for creating an archive database ? We have three members in DAG . If i don' t want replicate the archive database ,Do i need create the same database in all the DAG members ... If no need to create in all the DAG members what will happen if a ser ver fails in the DAG

Treat an archive mailbox the same as you would for a normal mailbox. If you are choosing to put the archive mailboxes on seperate databases and not host them on the database that hosts the primary mailbox then ensure you have database copies in your DAG. Ensuring you have database copies for these databases ensures the resilience of the archive mailboxes. OliverOliver Moazzezi | Exchange MVP, MCSA:M, MCITP:Exchange 2010, BA (Hons) Anim | http://www.exchange2010.com | http://www.cobweb.com | http://twitter.com/OliverMoazzezi

Hi You questions are similar on the below thread, Setting up a dedicated Archive Database http://social.technet.microsoft.com/Forums/en-US/exchangesvradmin/thread/09c1eb36-34fa-4476-8c81-75b97a1645cb Also for How to Create an Archive Database, you could follow the blog by Paul Cunningham http://exchangeserverpro.com/how-to-create-an-archive-database-in-exchange-server-2010 CheersZi Feng TechNet Community Support