Office Registry Fixes for Various O365 Issues

Outlook ignores autodiscover because your domain is part of an O365 instance, even though you use on-prem exchange-

Open RegEdit
Navigate to HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Outlook\AutoDiscover
New DWORD entry, ExcludeExplicitO365Endpoint -  value of 1.
------------------------------------------------------
You are using SAML and you get a white or invisible ghost window instead of a login screen-

[HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Common\Identity]
"DisableADALatopWAMOverride"=dword:00000001

If the above key change alone does not work, edit this additional Registry key:
[HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Common\Identity]
"DisableAADWAM"=dword:00000001

---------------------------------------------------------------

Prevent Outlook from ignoring autodiscover and connectiving to office 365

[HKEY_CURRENT_USER\Software\Microsoft\Office\x.0\Outlook\AutoDiscover]
"ExcludeExplicitO365Endpoint"=dword:00000001

---------------------------------------------------------------

You get a white window or one that disappears quickly-

HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Common\Identity]

"DisableADALatopWAMOverride"=dword:00000001

[HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Common\Identity] 

"DisableAADWAM"=dword:00000001

 

REMOVE EnableADAL under-

HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Common\Identity .

ADD-

HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Common\Identity]

"DisableADALatopWAMOverride"=dword:00000001

[HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Common\Identity] 

"DisableAADWAM"=dword:00000001

---------------------------------------------------------------