Windows can use random hardware addresses while scanning for and connecting to Wi-Fi. If your institution registers one MAC address per device, the address in its portal must match the one Windows uses for that network.
Use the per-network control
Open Settings → Network & internet → Wi-Fi → Manage known networks, choose the campus network and inspect the random hardware address setting. Prefer the network-specific control instead of changing the behaviour of every saved network.
Compare before changing anything
- Record the address currently shown for the campus Wi-Fi profile.
- Check the address stored in the institution’s registration portal.
- If they differ, ask IT which address should be retained.
- After an approved update, forget and reconnect to the network if instructed.
What this does not solve
A stable MAC address will not open blocked ports, change a strict NAT policy or authenticate an unsupported device. It only prevents an address mismatch.
Official reference
Microsoft documents the global and per-network controls in Connect to a Wi-Fi network in Windows.