We put a registry key on users laptops to toggle turning the proxy on and off when they are at home.
What do other people use so that if a user is at home and not connected to our VPN and just wants to surf and check email? Outlook seems to take IE settings so if the proxy is enabled and the user is connected to Wifi only then Outlook will not update and IE won't connect.
Firefox with no proxy set in the browser is a rough and ready workaround that we also use but far from ideal.
Users are mostly Win 10. Our DC is Win 2012 R2 and run Sophos Web Appliance Proxy as a VM.
Thanks