OIM - Modify User Profile

We have users who go into OIM and make a change to their profile such as their email address. This request then gets routed to the System Admin queue and I see it in my inbox (where I can approve or reject). But I want to disable this attribute...in my current environment this is the case for login ID which cannot be changed but email, number, timezone, etc can be changed. We want to disable all because users not be submitting change requests through here (we have a separate ticketing system which they should come through).