EV10 Web app and IE Proxy issue

Hi,

EV Server is using IE proxy for internet connection. If we try to browse any http://serverFQDN/EnterpriseVault stuffs it gives us error below

local server Error Code: 502 Proxy Error. The ISA Server denied the specified Uniform Resource Locator (URL). (12202)

However if we disable IE proxy it works fine.

We have added all EV URLs in Local Intranet zone and selected bypass proxy for Local intranet, but still doesn't work. Only way to get this working is by disabling proxy all together.

Any suggestion please?

Many Thanks