Office 365 keeps prompting for login credentials on Mac OSX?
Office 365 keeps prompting for login credentials within Mac OSX? I came across a problem where a client of mine had bought and installed Office Suite 2016 she than upgraded to Office 365 Business Premium.
Solution 1:
Here is what solved it for me. (Copied from: https://answers.microsoft.com/en-us/msoffice/forum/msoffice_outlook-mso_mac/authentication-failedcheck-your-account/063826c1-1e4c-40ba-9bfa-54e745925fc1 )
- Quit all Office applications (Word, Teams, Outlook, etc)
- Go to KeyChain Access.
- Search "Exchange" under Login --> All Items and delete everything.
- Search "Office" and delete everything.
- Search "ADAL" and delete everything.
- Launch Outlook.
- You will get the activation prompt and then If account is already added you will see the password prompt for app and ADAL again. Please do 2-Factor Authentication if asked to.
- If that doesn't work, do steps 2-4 but restart the Mac before launching Outlook.
Solution 2:
I had to uninstall office suite and clear keychain for Microsoft Office, once that was established Office 365 no longer kept prompting for key and user credentials. Hope this helps!