im using isa server and clients are using internet through isa client software and whenevery i access my exchange through explorer https://exch.ghantoot.local/owa it will give me error like that Network Access Message: The page cannot be displayed Technical Information (for Support personnel) Error Code: 502 Proxy Error. The ISA Server denied the specified Uniform Resource Locator (URL). (12202) IP Address: 10.0.0.5 Date: 5/26/2008 8:41:55 AM [GMT] Server: vpn.GHANTOOT.LOCAL Source: proxy and if i access it after remove proxy settings of my explorer then it works ... is it possible to access outlook through explorer without removing proxy settings and disable firewall client. if any budy know about this issue then please let me know please :( and if i want to access my internal outlook emails in any other location or in another office so is it possible to access these mails after configure outlook there? please do reply me with your best openion

There has to be a setting in the ISA server to allow outlook. www.isaserver.org has all that configuration information.