SEP 12.1.5 Deploy Remotely, How to uninstall newer versions of Microsoft Forefront

Good morning all,

We're working on trying to find out the best way to deploy our updated SEP client 12.1.5. We still have a few clients on our network that have never had their versions of Microsoft Forefront removed. We have been testing this in the IT office to see what Symantec would remove. We installed our install version of Microsoft Forefront which was a very old version of Forefront, but still outside of the approved application list. Users typically have Microsoft Forefront 4.6 installed through Windows Update.

Why does this new revision of a product not have an updated approved application list? Is there any way that we can modify Symantec to remove the software prior to pushing out 12.1.5?

Thanks!