Help to remove blocking of MS outlook through ISA 2004

Hi,

 

I am using Windows server 2003 network with ISA 2004 as proxy. I am having problem in passing MS outlook requests. Even I created a firewall rule to allow all outbound traffic to external, but unable to solve the problem. Outlook configuration is quite OK as when I by pass proxy, it works fine.

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Qaisar Naseem
Network Admin
Express News TV
+923457263848