"DisableADALatopWAMOverride"=dword:00000001 [Computer\HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Outlook\Autodiscover] "ExcludeExplicitO365Endpoint"=dword:00000001 "ExcludeHttpsRootDomain"=dword:00000001 2. Then add the email accounts as usual. Note: I've also noticed with "DisableADALatopWAMOve...