532 votesDustin P commented
Worked for me, just restarded Outlook and no issues.
A step by step for those (like me) that were a bit rusty:
navigate to the file path on the left side of screen to HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Common\Identity
once at the above location, rigth click in white space on right hand side (or on the top tabs Edit>New), select DWORD (32 bit).
give it the exact name "DisableADALatopWAMOverride"
double click (or right click>Modify) on DisableADALatopWAMOverride and change its value to 1
Cheers and THANk YOU Rasmus Dybro !