SMTP Relay Help
I am trying to get SMTP Relay setup to work through O365. Currently we are using an on-prem Exchange server for SMTP Relay, but I want to use O365 instead as we plan to go full cloud with Exchange in the near future. Has anyone ever done this and if so, can you tell me what you had to do?
I have been using the following link to try and make this work, but have been unsuccessful so far: