I am attempting to prevent users of our WiFi from sending and receiving messages via Apple's iMessage service on their WiFi only mobile devices. I have enabled application awareness on our Zonedirector and created a policy to block iMessage. THis policy is then applied to the relevant SSID.
However, iMessage isn't blocked. Can anyone advise what might be wrong, or if there's a different way to achieve this?
I am not aware about any known issue but you can always upgrade to the recommended version 10.2.1.0.183 and see if it makes any difference.
If you wish to troubleshoot this on current version, please open a support case.