Hey,
We have 2 'in production' sites with only a single Exchange Server in the primary site (Site A). I'm looking into putting a local Exchange Server in the secondary site to be able to achieve :
1) a local server in Site B that stores the mailboxes of those users in that site, so they have LAN access rather than WAN. Email would still be sent/received through Site A's server though
2) A DAG would be setup for Site B in Site A so if their local server went down they'd still have access via Site A
3) The reverse of point 2)
4) If Site A completely failed, change the public MX records so that email is delivered to Site B. I know I could add a secondary MX record so it automatically uses Site B if Site A is down, but that would cause Split-Brain, wouldn't it, if Site A came
back up and accepted email delivery before the 2 sites were sync'd. I understand Split-Brain to be out-of-sync databases
We have a 30Mb connection (fiber) between sites.
Thanks for any advice.