A Microsoft file hosting and synchronization service.
Hello.
I have copied and pasted the solution that fixed it for us that was provided by Office 365 support below. I was informed that the issue should be fixed in a later patch.
First of all, please close everything, delete the cache and test one more time the behavior. Afterwards try:
Please navigate to RegEdit as admin and create the following:
HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Common\Identity
Right-click the entry, and then select New. Add a new DWORD value to the registry called NoDomainUser, and then set it to a value of 1.
HKCU\SOFTWARE\Microsoft\Office\16.0\Common\Identity\EnableADAL
Right-click the entry, and then select New. Add a new DWORD value to the registry called EnableADAL, and then set it to a value of 0.
Hope it helps.