as i have seen so far accessing CRM2015 from outside the company network works via VPN if you access it using the web client or CRM for Outlook.

But what about the mobile/tablet apps for windows/ios/android? Technically it shouldn't be a any problem to access since iam connected to the internal network once iam connected to the VPN server.

Online documentation for CRM 2015 does not tell anything about VPN connections to CRM 2015. So is this possible in general and particularly for mobile/tablets?