How to Make Email Recipients Read-Only or Remove Reply Options in Activity Stream (SIR Workspace)

[oliviagarcia]

Hi everyone,

I'm working with the Security Incident Response Workspace in ServiceNow and looking to restrict user actions on email replies.

Specifically:

When a user clicks "Reply" or "Reply All" on an email in the activity stream, I would like to either:

1. Make the "To", "CC", and "BCC" fields read-only in the Email Compose window,
   or
2. Completely remove or hide the "Reply", "Reply All", and "Forward" options from the 3-dot menu in the activity stream.

The goal is to limit outbound communication to predefined recipients for compliance reasons.
If making the recipients read-only isn't possible, hiding the reply/forward options altogether would be an acceptable alternative.

Has anyone achieved this via configuration, ACLs, custom components, or scripting?

Thanks in advance for your help!