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Small and medium business | Business Central, N...
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SMTP error for one user ,' SMTP server require secure connection or client was not authenticated

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Getting SMTP error for one of user but for other its is working fine.

Got all check at organisation profiles for this particular user .

Looked for any Outlook profile level issue it is normal like any other user who were added into NAV user page.

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I have the same question (0)
  • Suggested answer
    Vanessa Garcia Profile Picture
    on at

    Hi there,

    not sure if this could help you.
    They are talking about exactly the same error you are facing:

    https://community.dynamics.com/business/f/dynamics-365-business-central-forum/297366/he-smtp-server-requires-a-secure-connection-or-the-client-was-not-authenticated-the-server-response-was-5-7-57-smtp

    Also you can check this video, where they explain how to fix the problem as well:

    Dynamics 365 Business Central - How to Setup Email (SMTP Mail Setup Error Resolved)
    https://www.youtube.com/watch?v=9witFZaKj-k

    I hope it helps,

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