How to make a technician inactive?

How to make a technician inactive?

Hello

I am preparing a report (non SQL but regular) in order to see what active technicians I have.
And I have a desired report with a collumn active where all my technicians are active.
So I wonder how to make sometechnician inactive if they are out of active support?
I cannot see any option when editing a technician to mark them inactive 




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