I have a powershell script that makes an API update via post to update ticket fields.

For some reason I can't seem to update the "Email(s) to Notify" field via the API

It looks like the name for this field is "emailcc" according to the API Documentation; however, when I attempt to update the request and add an email address to this field it doesn't seem to work, even though I can update other fields with the same script.

Anything I need to do differently to change this field?