We need to create a new Category where all the requests opened with that must attach a file. How can we do it in Service Desk 17?
OOTB this cannot be done. However you can review the below posts\threads that are similar to yours which seem to allude this being done via a customization:
How to make attachments mandatory for specific request areas
How to make Attach Document field mandatory.
Hope these help?
Thank you very much Brian!
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