Hello,
I was wondering if you could assist with the following scenario:
1. Main site loses both internet and private tunnel to the DR site. 3 Member DAG (DAC enabled CAS/MBX 2013 roles on each) spread across sites (2 members in main site and 1 in DR which is in passive mode). Been called to flip mail routing
to DR site
which is not affected by the outage.
2. Users are working in main site sending email to external and internal clients not realizing there are issues. I as an IT Admin am not available in the main site so cannot run the DAG commands to stop the main site exchange servers
which are running. I do the DNS record flip and activate the databases in DR (Stop-Clussvc and Restore-DatabaseAvailabilityGroup DAG1 -ActiveDirectorySite DR.)
3. My question is what would happen if services are restored at the main site and the databases are still mounted there since the servers were fine all along? What would happen to emails that were flowing between users at the main site?
Would there be data loss or database corruption between the main site and DR? How would someone deal with this situation?
Thanks