OAuth support for smtp authentication

Q1. End of support of smtp basic auth for Exchange Online
In the second half of 2025, Exchange Online will no longer support basic smtp authentication for sending emails.

Q2 - Who is impacted?
Every users of Exchange Online to send emails notifications.

Q3 - Why is it important and/or urgent?
End of support in the second half of 2025.

Solution
It will be necessary to use another protocol like OAuth to authenticate to Exchange Online.

Hello @hansolo57,
Thanks for bringing this to our attention!

We created an internal ticket for the development team (ref. PB-37583) for this request.

Best regards

Here is the official announcement to that effect:

Exchange Online to retire Basic auth for Client Submission (SMTP AUTH) | Microsoft Community Hub