How to Remove Queue Access for the Agent who is not longer helpdesk Agent?

Summary:

We have a list of individuals who no longer work on helpdesk tickets due to reasons such as department changes or promotions. We have removed the Helpdesk Agent Resource role from their profiles and taken them off their respective queue resource lists. However, we are still able to assign tickets to them.

Expectation is We should not be able to assign the request to the person who is not part of the queue.

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