Found this error again on one of our staff Outlook application.
Quick solution :
Disable Modern Authentication by regedit to HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Common\Identity, create a DWORD item named EnableADAL and set it to zero.
Under the same registry key, create a DWORD item named DisableADALatopWAMOverride and set it to 1.
