Access Admins are special user accounts that are able to modify access control configurations. Only grant this permission to users you wish to be administrators of your system.
You must have Access Admin privileges
To grant an existing user Access Admin rights go to Home > Access and select the Access Users button in the upper right corner.
Search for the user and select the desired user's name, then select Profile to make changes to the user's profile.
From the Profile page, toggle the Access Admin slider to grant the user Access Admin rights. You can similarly revoke manager rights in this manner.