Wherever you use your device, make it sure it is connected to the internet. There are two ways to do it either via wired connection or WiFi.
When you are connected to the internet and the Windows on your device detects the connection you see that status appearing in the bottom right corner of the screen. (See the red frame in the picture below)
To access university services from outside the campus, you also have to connect to our VPN and log in then. In such cases you always see a doubled computer icon in the bottom right corner of the screen. (in the red frame below)
Windows indicates when an available WiFi network is detected. Connect to one, then connect to VPN as described above.