Cannot connect to remote servers or exchange email?

I have the same issue and can connect via any other connection including Att hotspots, wifi etc etc.  I do not think the issue is related to my system and to clarify, I am not connecting via VPN.  Any help on this is greatly appreciated. 

VZW mobile broadband devices sit behind a NAT firewall.  The NAT hides your public IP Address and the firewall blocks custom ports from communicating to devices on the VZW network.  Pending on what you are trying to do on your remote servers or exchange servers one of the other is likely broken due to the nature of the VZW network.
The work around is to setup a VPN to a VPN server that allows you to make the customizations that you need to support your applications.  That or buy a static IP address from VZW for $500.  That or configure your applications to communicate over the internet over more traditional protocols and ports.
Contact your system or network administrators in charge of your remote servers to find out what the requirements are for connecting to them.  See if they can offer you any work arounds or custom configurations.  Chances are others have the same limitation and they already have something cooked up to work around it.

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