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.
I just wanted to ask how far you are with that issue. Microsoft changed the timeline, but starting on 1st of March they will discontinue SMTP Basic Auth.