I have an exchange server 2010 and have migrated all mailboxes to office 365. Currently, I have setup connectors to and from the exchange server and office 365. I have not yet move the MX records.
I have a couple custom apps that do not support TLS. These two apps are what is holding me back from moving the MX records. I’ve read that I need to setup a relay server.
Our setup is a hybrid setup which means that the exchange server stays. Can I use the current exchange server as my relay server and then move the MX records? If so, what changes do I need to do in the exchange server (I’ve never setup a relay server)?
Thank you.