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535 5.7.139 Authentication unsuccessful, user is locked by your organization's security defaults policy. Contact your administrator

GAC.SFC 30 Reputation points
2024-01-02T02:20:42.63+00:00

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  1. Vahid Ghafarpour 23,385 Reputation points Volunteer Moderator
    2024-01-02T06:25:55.42+00:00

    Thanks for posting your question in the Microsoft Q&A forum.

    Did you check this article?

    https://learn.microsoft.com/en-us/exchange/troubleshoot/email-delivery/fix-issues-with-printers-scanners-and-lob-applications-that-send-email-using-off#error-authentication-unsuccessful

    You can check defaults here:

    https://learn.microsoft.com/en-us/entra/fundamentals/security-defaults

    ** Please don't forget to close up the thread here by upvoting and accept it as an answer if it is helpful **

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  1. Mehrdad Makky 0 Reputation points
    2024-08-28T08:11:15.5433333+00:00 
    2024-08-28 08:05:34 SERVER -> CLIENT: 535 5.7.139 Authentication unsuccessful, user is locked by your organization's security defaults policy. Contact your administrator. [FR0P281CA0044.DEUP281.PROD.OUTLOOK.COM 2024-08-28T08:05:34.207Z 08DCC50540F9F00F]
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  2. Intheca IoT Platform Message System 0 Reputation points
    2024-09-11T09:52:39.09+00:00

    "Error: Invalid login: 535 5.7.139 Authentication unsuccessful, user is locked by your organization's security defaults policy. Contact your administrator."

    I am using mail node on Node-red and I made my settings according to microsotf365. Auth settings were also made from the admin page, but I keep getting this error.

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