Procedure
To remove a role for a user, proceed as follows:
Click the Apps icon in the top bar
and select Administration.
Result: The Administration module appears.Click Users in the menu on the left-hand side.
Result: The list of available users is displayed.Click on the user for whom you want to remove a role.
Result: The details page for this user appears.Click the trash can icon to the right of the role you want to remove.
Result: The Remove role window appears.Click Yes to remove this role for this user.
Result: The role has been removed.