Hello,
My current full time job is systems admin in Calgary Alberta, Canada. and I deal almost completely with windows server.
anywhere from Old Server NT to the new 2016.
the tasks you mentioned should not be a problem and can be completed very quickly.
the only question I have is the 3rd point. what do you mean the server does not recognize you as admin? You cannot log in to the server at all?
Regards,
Zingee