Dear Exchange experts We have 6 mailbox servers in exchange environment. 4 servers in HQ site and 2 Servers in DR site. Sometimes database is automatically mounting to DR servers (Which is used for database copy) and due to this OWA cannot work and we cannot move database. How can remount these database back to HQ site Please help Ashraf

You can move them back the HQ site using the Move-ActiveMailboxDatabase cmdlet. Consider using: Set-MailboxServer -Identity DR_MAILBOX_SERVER_NAME -DatabaseAutoActivationPolicy Blocked to keep databases from automatically failing over to the DR site. Also consider configuring: Set-DatabaseAvailabilityGroup -Identity DAG_NAME -DatacenterActivationMode DagOnly to prevent a split-brain situation in the event of the loss of your primary datacenter. Ed Crowley MVP "There are seldom good technological solutions to behavioral problems."

ThanksAshraf

Thank you for posting this, I was looking for exactly this topic. I would like to clarify: 1 DAG covering all sites Lets say we have 4 sites, 3 production and 1 DR at each production we have 2 MBX that has copies of the local sites databases and the DR site has a copy of ALL databases. Example: Site A: mbx1/mbx2 with Database 1/2 SIte B mbx3/4 with database 3/4 DR with mbx with database 1/2/3/4 I would enable the above commands and this would provide me with the follwoing auto failover at each site with Manual failover at the DR site by doing no more then right clicking and activating the copy.Thanks, Grady Vogt

My answer above should support what you want.Ed Crowley MVP "There are seldom good technological solutions to behavioral problems."