F5 webmail exchange 2016 - "Access policy evaluation is already in progress for your current session."

Hi,

This preload issue could be solved with this irule:

when ACCESS_SESSION_STARTED {
    set landinguri [ACCESS::session data get session.server.landinguri]
    switch -glob $landinguri {
        "/owa/plt1.ashx?*" -
        "/owa/sessiondata.ashx?appcacheclient=1" -
        "/owa/userspecificresourceinjector.ashx?*&appcacheclient=1*" -
        "/owa/manifests/appCacheManifestHandler.ashx?owamanifest=1" {
            ACCESS::respond 403 -version "1.1" noserver "Connection" "Close"
            ACCESS::session remove
            return
        }
    }
}

Cheers,

Kees