Office 365: Basic Auth is disabled

Since October 2022 Basic Auth is by default disabled for IMAP and POP3 in Exchange Online / Office 365. Microsoft recommends using OAuth 2.0.

Re-enable Basic Auth

You can re-enable Basic Auth for IMAP and POP3 for your tenant:

Auth 2.0

Alternatively you can switch to OAuth 2.0 for authentication purposes:

Daemons/Services: Password grant (MFA/2FA must be turned off for this account):

Daemons/Services: Client credential flow:

Web apps (requires user interaction):

Standalone devices (requires very little interaction):

Desktop apps (requires user interaction):


Consider using our Q&A forum for asking questions.