This documentation [can be improved] - https://experienceleague.adobe.com/docs/experience-manager-65/administering/operations/notification.html?lang=en#setting-up-oauth #302
I am T3 with Adobe AEM and I needed to dig into so many external articles in order to get this going.
Here are the issues
Check the tickboxes for SMPT use StarTLS and SMTP requires StarTLS this makes 0 sense its only StartTLS that is needed why is it there 2 times, also you have a typo in a 4 letter word its SMTP, not SMPT
I am T3 with Adobe AEM and I needed to dig into so many external articles in order to get this going.
Here are the issues
I haven't tried it with MS365 yet but I can just imagine that's also wrong.