Default [Q] Sony Xperia Z1 will only connect to Exchange server on internal wifi network

Hi,

Sony Xperia Z1 unable to open connection to Exchange Server unless connected to internal office WiFi.

It's like it can't resolve the mail server name by DNS.

However I also tried putting the mail server ip address in directly to the server name field and it still won't connect.

Any ideas as we have been having major Exchange issues with this phone ever since purchase but it's worse now since the 4.4.2 upgrade.

Email account works fine on Note 3 and iPhones. - Also works fine on Z1 with Touchdown installed so is a definate Sony issue.

Thanks.


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