A September update from Microsoft revealed they will resume the retirement of Basic Authentication for legacy protocols. Meaning, any email client that doesn’t fully support Exchange won’t work.
Today, we are announcing that we are restarting the program to end the use of Basic Auth in Exchange Online. Beginning October 1, 2022, we will begin to disable Basic Auth in all tenants, regardless of usage.
If you aren’t already, please use one of the supported email clients listed below.
- Outlook (all versions, iOS, android, windows, web, Mac)
- Windows mail
- Apple mail (iOS and macOS)
- Google mail app on android.
If you are unsure or have questions, please contact support.