Disable Attachment Upload on Service Portal for Closed RITM

[abhijee]

Hello Team,

I am working on a requirement to disable the attachment upload option on the Service Portal once a Requested Item (RITM) reaches a closed state (such as Closed Complete).

The expectation is that after the request is closed, users should not be able to add any new attachments from the portal (Attachment tab).

I have already tried using the disable_attachment method, but it is only working in the native UI and not on the Service Portal.

Has anyone worked on a similar requirement before? Could you please guide me or suggest a solution?

Thank you in advance.

[Subalakshmi P2]

Might be. This is a new customer environment with quite a few existing customizations and limited documentation. I'll check what's generating that comment, as it doesn't seem to be OOB behavior.
Thanks for your support.