Starting on October 1, 2022, Microsoft is starting to disable an outdated way of logging into Exchange Online known as “basic authentication.” This outdated method is vulnerable to various forms of p...
Updated Aug 26, 2026
Version 9.0
Blog Post
4 MIN READ
Exchange Online email applications stopped signing in, or keep asking for passwords? Start here.
Greg Taylor - EXCHANGE
Microsoft
Microsoftdz890 - first off, if the app is sending mails, and using SMTP - it won't be impacted. I may have mentioned this before somewhere, but we're not touching SMTP. It can keep using basic (app passwords or not) just fine.
If it's using EWS, or EAS, or even MAPI to send mail, then it would be impacted. But I would bet it's using SMTP.