After migrating from on-perm to Office 365 on terminal server I get this blank authentication window. the fix I found is to add in the registery this key : HKCU\SOFTWARE\Microsoft\Office\15.0\Common\Identity\EnableADAL
After migrating from on-perm to Office 365 on terminal server I get this blank authentication window. the fix I found is to add in the registery this key : HKCU\SOFTWARE\Microsoft\Office\15.0\Common\Identity\EnableADAL