When you unassign an administrative role from a user, the user can no longer perform the administrative actions granted by that role. If the user has other administrative roles assigned, he or she can still perform the administrative actions granted by those roles. If the administrative role you unassign is the user's only administrative role, he or she is no longer recognized as an administrator by the system.
There are two ways to unassign an administrative role from a user: from the Users page or from the Administrative Roles page.
In the Security Console, click Identity > Users > Manage Existing.
Use the search fields to find the administrator from which you want to unassign an administrative role. Some fields are case sensitive.
Click the user from which you want to unassign an administrative role, and click Administrative Roles.
Click the administrative role that you want to unassign, and click Unassign Role.