Has the device checked into the MDM in that time. If I remember correctly, the AD sync actually happens when the device checks in.
Thanks for your reply. It's however the USER that I want to update from Active Directory. There is no device attached to the user.
If what you are saying is correct I should add a device to test?
Well just to be sure. If you are referring to a user that you are trying to add to the administrators groups in LANrev, then it should be seen with or without a device. If you are are referring to a Device User, then I believe you do need to assign a device to the user before the user information will be updated.