Users can no longer connect to our Exchange 2010 server when connected to our corporate Wifi network when using iPhone or iPad (since approximately Nov of last year).
Nothing has changed on the network and Android devices are unaffected so I assume the problem lies with an IOS update.
Apple device users can retrieve email when on public WiFi (e.g. hotels etc) or when using their data connection but can't when connected to the internal corporate Wifi network.
Any suggestions please?