I have Forefront TMG 2010 installed as a Proxy server to limit internet access to users. I usually have the following issues:
1- I can't configure Email clients (Outlook) with URLs of POP/IMAP and SMTP and I have to locate the respective IP to make it work directly through clients.
2- Accessing local network resources (i.e. Network printer) with a certain internal IP and an assigned port (i.e. 10.255.255.20:3911) is impossible while Firewall is ON.
3- Certain URLs (usually secure HTTPS) with different ports (i.e. https://www.contoso.com:2083) are not working.
I tried tens of walkthroughs to add new outbound protocol with specified protocols but none of them work for me.