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Unable to accsess Exchange on a wireless VLAN

Last Modified: 2016-11-23

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!
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