When I try to add a role assigment, my users dropdown window does not list access to : AD user, service prinicple and so on. I mean there are no assign access to AD option in the list for me. 
Can anyone please guide me so I understand why and how I can have AD user, group, or service princicpal. I see that I only have user, group, or service princicpal. Thank you so much Regards, TN



