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• Mac outlook 2016 server for account returned the error [authenticationfailed] for mac#

Hopefully Apple fixes it as a whole, because I loved working with it.

On macOS Sierra everything worked like a charm, but after the macOS High Sierra update everything about the Mail app started failing. It's a pity though that I have to download a third-party app to have a fully working mailing program. I installed an alternative application for my mails called "Spark", and with the same credentials etcetera I can now receive my mails again. The server for account 'Me' returned the error 'AUTHENTICATIONFAILED Authentication failed.' Your username/password security settings may be incorrect. At home, the Mail app doesn't even connect to the server so I don't receive my mails outside of work. On my proper account, the normal Mail app doesn't receive new emails when I'm at work (where the mail server is located) without forcefully closing and re-opening the app.

Mac outlook 2016 server for account returned the error [authenticationfailed] for mac#

The connection failure occurs because Outlook for Mac uses SSL to establish communication with an Exchange server. All three options lead to the same result: nothing changes and I keep getting the certificate notification window. You cannot connect to a server that is running Microsoft Exchange Server from a Microsoft Outlook 2016 for Mac or Outlook for Mac 2011 client after disabling Secure Sockets Layer (SSL) on the server. When clicked, it keeps telling me something about the certificate and I can click "details", "cancel" and "continue". In your Mac Outlook application, click on Tools tab and select Accounts to fix Outlook for Mac not sending or receiving messages Navigate to Exchange account that is situated in the left-side of pane. I made sure to always trust them, but when I open the Mail app on the fresh user account, there is a triangle with an exclamation mark besides the name of the account folder. Multiple times I tried to enter my credentials and go through the dialogue of creating such account, but it always gives me certificate-related notifications. I tried your suggestion by making a new user account and adding the Exchange account.