Windows computers need to check in with their licensing server every 180 days or the licence will expire. The computer needs to be connected to the network for the activation to work which poses a problem since the University buildings were closed in March. We have observed some situatoins where computers that are connected to the VPN don't update the licence and it has to be done manually. This article advises how to renew the licence on your computer.
Microsoft Windows 10 registered by a University department/institution