We have four Exchange servers, two in the main office and two in DR site. On both sides, one server has client access and hub transport role and second server has mailbox server role. We have a stretched DAG across two sites.Due to SAN maintenance, we need to first take Exchange Servers in DR site down, do the required maintenance on SAN, bring DR servers up and then take the servers down in the main office.We do not want the databases to failover.What is the proper procedure for doing so?
In the DR site the Database Copy Activation Policy is "Blocked"
In the Main site the Database Copy Activation Policy is "Restricted"