I cannot access Exchange while on a wireless VLAN on my iPhone 5S. I can access it through the Outlook app, but on the mail app it says 'Cannot authenticate account information'. The VLAN is on 172.16.1.x /16 and the exchange server is on a 192.168.10.x / 24 subnet. The router we are using is a Dell SonicWALL NSA 220. I have tried messing around with the routing table.
Thanks in advance!