When you modify an item on the Trunk Group Access page, you cannot change the user ID or the assigned trunk groups. You can only modify the access permissions.
Procedure
Navigate to Administration > User Permissions > Trunk Group Access.
From the Current ACD list, select the active ACD for which you want to manage trunk group access.
CMS Supervisor displays the existing trunk group data and exception access permissions for the selected ACD.
Click next to the item you want to modify.
The Modify Item window is displayed.
Select or clear the Read, Write, and Exceptions check boxes as required.