In our exchange 2010 infrastructure we have the following servers in primary site:
Two CAS servers
Two Hub transport servers
Two Mailbox servers
One Application Request Routing Server (ARR server)in DMZ for Active Sync client, Outlook Anywhere, Webmail service.
and in the DR site:
One Edge server (I have installed edge server since we are using Iron port in the primary site and we do not have any Iron port available in the DR site)
Now I need to ensure disaster recovery site will be available in case of primary site failure and users should be able to access email from DR site using Outlook (Mapi client, Active Sync(Mobile Client), Outlook web access, Outlook Anywhere.
Could you please advise:
1. What are the technical steps would be needed to perform site failover.
2. Do I need to publish another MX record with lower priority for DR site or I can use the existing IP to point to DR EDGE server.
3. At present, MAPI clients are directly pointing to CAS01 or CAS02, and should I need to change in DNS to point to DR CAS.