Enabling junk email in outlook 2010 via group policy

I added a couple new things to my group policy for enabling Junk Email and setting it to high in Outlook 2010. Most people have gotten the change and some not. When they look at their Outlook the Junk option is grayed out. We only have 9 group policies total and I've made the change to all of them. I've run gpresult /r on those machines and it shows the group policies being applied. Don't know what to check next!

Thanks