IE choking on exchange iRule

Hi laerm, the popup isn's using the referer header that we key on to tell us that the request came from OWA instead of EAC. Try modifying your rule to include the URL for the rule editor:

when HTTP_REQUEST {
    if { [string tolower [HTTP::uri]] contains "/ecp" } {
        set response "EAC Access Denied
        We are sorry, but access to the Exchange Administration Center is
        restricted to approved client IP addresses. Your IP address, 
        [IP::client_addr], is not approved."
        if { [HTTP::header exists "Referer"] } {
            if {[HTTP::header "Referer"] contains "rfr=owa" } {
                pool my_owa_pool
            }               
        } elseif {[string tolower [HTTP::uri]] contains "/ruleseditor/editinboxrule.aspx" || [class match [IP::client_addr] equals "exchange_2013_trustedAddresses"]} {
            pool my_owa_pool
        } else {
            HTTP::respond 200 content $response
        }
        unset response
    }
}