It seems some applications on Windows, e.g. Office 365 freak out when eduVPN (or other VPN) is enabled and is not the "default gateway". The OpenVPN server pushes the def1 flag which is basically a "split tunnel" configuration that somehow prevents Office 365 from detecting it is "online".
IP address and default gateway settings are assigned May 25, 2011 Windows 7 - cannot browse internet after connecting Jan 20, 2017
May 30, 2013 · It will jump straight to the "Set up a virtual private network (VPN) connection" window in the wizard. 2. In the Internet address field, enter the IP address of the VPN server or the network's
IPsec/IKEv2 VPN: Tips when connecting a Windows 7, Windows If no communication occurs between the VPN's nodes for several minutes, the idle Child SA is deleted by the Windows 7/8/10 client. A new Child SA is dynamically created again by Windows 7/8/10 client or Rockhopper gateway/server when the next communication to be encrypted occurs. How to Connect to a VPN in Windows 7 - dummies Windows 7 opens a dialog box that shows all the available networks in your area. Locate the VPN you want to connect to and click its name and then click the Connect button. The button only appears after you click the name of the network. To disconnect from a network, click the network name in this dialog box and then click the Disconnect button.
When the "Use default gateway on remote network" option is disabled, the client receives a route to the remote network based on the "classful" IP address of the VPN server (this changes in Windows 7, but I don't have details of the change handy).
A VPN gateway connection enables you to establish secure, cross-premises connectivity between your Virtual Network within Azure and your on-premises IT infrastructure. This article shows how to validate network throughput from the on-premises resources to an Azure virtual machine (VM).