Trying to make Outlook 2016 work on Windows Server 2008 R2 Standard with O365 accounts. But every time I try to add an account to Mail (in control panel, so I can use it in outlook) it will drop the modern authentication window but it's blank so I'm stuck. Nothing I've found online worked permanently so far:
- Office and Windows is fully up to date
- Nothing saved in credential manager
- Already ran repair setup for Office and even reinstalled Office
- Tried the following regedit methods
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Office\15.0\Common\Identity\Version (value set to 0)
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Office\15.0\Common\Identity\EnableADAL (value set to 0)
Setting Version dword to zero in the registry lets me add the account in Mail (in control panel) because it drops the oldschool login window and that one works fine. But as soon as I open Oultook it drops the modern auth window and it's blank again. Fun fact: after doing so, I can see the dword Version being set back to 1 instead of 0 automatically. It doesn't even make sense...
Already checked our O365 company settings and modern authentication is disabled completely for all users. Already tried enabling it then disabling it again. Didn't work.
It seems like something is forcing my outlook to use modern authentication instead of the old one and that's messing up the whole thing. Already tried the other way around by "fixing" modern authentication window like this:
It didn't work either, the modern authentication window was blank and useless. Anybody got any ideas on how to fix this?