Hello. I am hoping someone can provide some pointers for a solution I am trying to figure out.
I have a hybrid configuration with O 365 and on prem Exchange. We also use Mimecast gateway.
So, normal email flow will be through Mimecast > O365 > On Prem Exchange.
This is what I am trying to figure out. If Mimecast has an outage is there a way for me to "easily" take Mimecast out of the flow. So that mail now flows through O365 > On Prem Exchange?
Can I add another MX record for O365 and set it to a lower priority? And add alternate send and receipt connectors from O365 to on prem Exchange?