After enabling RRAS can't remote desktop

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http://serverfault.com – I've installed and configured the Network Policy & Access Services role on my win2k8-r2 server according to this guide: http://technet.microsoft.com/en-us/library/ff687692%28v=ws.10%29.aspx I've set up the server to accept PPTP connections and that is working great. However, after doing so I noticed that I can no longer remote desktop to the server from within the intranet. Once I stop the Routing & Remote Access service I can RDP into the server again, but obviously that kills access to the VPN clients. How can I leave the RRAS enabled and still allow internal users to RDesktop to (HowTos)