Outlook App Password

APP_PASSWORD 1 Reputation point

I use an Outlook account as an email sender. Recently all my attempt to send email has met with this error

535 5.7.139 Authentication unsuccessful, the request did not meet the criteria to be authenticated successfully. Contact your administrator.

This process was working for several years now and this is the first time I have seen this issue.

  1. is this a new policy?
  2. I was trying to add App Password method on Security Info but the option is not available.
Microsoft Entra ID
Microsoft Entra ID
A Microsoft Entra identity service that provides identity management and access control capabilities. Replaces Azure Active Directory.
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  1. Andy David - MVP 140.8K Reputation points MVP
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  2. Carlos Solís Salazar 16,351 Reputation points

    Hi @APPPASSWORD-7272

    Thank you for asking this question on the **Microsoft Q&A Platform. **

    It looks like the user has the MFA active.

    If you have the privilege, check in your Azure AD the Sign-In logs for the user

    If you have a new policy and require not to use an MFA, use the following method "Authenticate an IMAP, POP or SMTP connection using OAuth"

    Hope this helps,
    Carlos Solís Salazar


    Accept Answer and Upvote, if any of the above helped, this thread can help others in the community looking for remediation for similar issues.
    NOTE: To answer you as quickly as possible, please mention me in your reply.