Users with the queue_admin or queue_manager can remove a user or group from a work queue.
To delete a user or group from a work queue:
Click Work Queue Monitor or select to Work Queue Management > Work Queues.
Navigate to the active work queue.
Click the queue’s number users link in the Active Users column.
Select the user or group to delete from the work queue.
Select File > Remove Member.
Click Continue.
Click OK.
If you delete a user from the queue after they have acquired a task, it remains in the user’s Inbox until they have completed the task.