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I have performed all of the steps to setup Microsoft authentication according to the documentation and was able to generate the token that is required for FluentSMTP. I used an email address of a Basic O365 user for the sender. I could not create a token using single tenant but once I changed to multi tenant the token could be created. I am now attempting to run a test email from the Fluentsmtp menu and the test email will “fail” with a notice at the bottom of the screen that says “forbidden”. I’m not sure where this error is coming from or even how to troubleshoot to find the answer? Any help would be much appreciated.