Stop to select non-existent requester

Stop to select non-existent requester

Dear Support,

When I create a new Request I have to fill the Requester Details form. Under it there is a "Name" parameter. We are using AD integration and select the requester name from the list the SDP offers.
If our colleagues make a mistake and accidentally hit an enter without selecting the proper AD user they are able to record a ticket with a non-existent account that will be recorded to the requester database also.
Because of this there is a lot of similar (an non-existent) requester in the requester database that are unusable.
Is there a chance to stop SDP to allow selecting a non-existent AD user as the ticket requester?

Regards,
Miki
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