Exchange 2010 iApp problems with Mac OSX 10.8 Mail App

 iRule to select pool and persistence method when all HTTP-based services are
 accessed through the same virtual server. This iRule uses an HTTP header
 inserted by a BIG-IP Edge Gateway for persistence (if that header is present)
 Otherwise it will set persistence according to traditional methods.
when HTTP_REQUEST {
    switch -glob -- [string tolower [HTTP::path]] {
    "/microsoft-server-activesync" {
         Direct all ActiveSync clients to a common pool; use Auth
         header value if it exists (Basic auth only, which is the
         default); otherwise we fall back to client IP
        if { [HTTP::header exists "APM_session"] } {
            persist uie [HTTP::header "APM_session"] 7200
        } elseif { [HTTP::header exists "Authorization"] } {
            persist uie [HTTP::header "Authorization"] 7200
        } else {
            persist source_addr
        }
        pool FC_EX2010_DC1_CAS_as_pool3
        
        CACHE::disable
        return
    }
    "/owa*" {
         Outlook Web Access
        if { [HTTP::header exists "APM_session"] } {
            persist uie [HTTP::header "APM_session"] 7200
        } else {
            persist cookie insert 0
        }
        pool FC_EX2010_DC1_CAS_owa_pool3
        return
    }
    "/ecp*" {
         Exchange Control Panel.
        if { [HTTP::header exists "APM_session"] } {
            persist uie [HTTP::header "APM_session"] 7200
        } else {
            persist cookie insert 0
        }
        pool FC_EX2010_DC1_CAS_owa_pool3
        return
    }
    "/ews*" {
         Exchange Web Services.
        if { [HTTP::header exists "APM_session"] } {
            persist uie [HTTP::header "APM_session"] 7200
        } else {
            persist source_addr
        }
        pool FC_EX2010_DC1_CAS_oa_pool3
        
        CACHE::disable
        return
    }
    "/oab*" {
         Offline Address Book. Persistence is not required for OAB
        pool FC_EX2010_DC1_CAS_oa_pool3
        return
    }
    "/rpc/rpcproxy.dll" {
        if { [HTTP::header exists "APM_session"] } {
            persist uie [HTTP::header "APM_session"] 7200
        } elseif { [string tolower [HTTP::header "Authorization"]] starts_with "basic" } {
            persist uie [HTTP::header "Authorization"] 7200
        } else {
            persist source_addr
        }
         Outlook Anywhere.
        pool FC_EX2010_DC1_CAS_oa_pool3
        
        CACHE::disable
        return
    }
    "/autodiscover*" {
         Autodiscovery. No Persistence.
        pool FC_EX2010_DC1_CAS_ad_pool3
        return
    }
    default {
         This final section takes all traffic that has not otherwise
         been accounted for and sends it to the pool for Outlook Web App
        if { [HTTP::header exists "APM_session"] } {
            persist uie [HTTP::header "APM_session"] 7200
        } else {
            persist source_addr
        }
        pool FC_EX2010_DC1_CAS_owa_pool3
    }}
}
when HTTP_RESPONSE {
    if { [string tolower [HTTP::header values "WWW-Authenticate"]] contains "negotiate"} {
        ONECONNECT::reuse disable
        ONECONNECT::detach disable
        NTLM::disable
    }
        if {[HTTP::header exists "Transfer-Encoding"]} {
        HTTP::payload rechunk
    }
}