PC Client Settings on LAN to Update to WSUS Server
To change computers in the network to update from Microsoft products to WSUS Server, you can do it through Group Policy.
Open the Group Policy Editor and navigate to:
Windows 10 and earlier
“Computer Configuration > Administrative Templates > Windows Component > Windows Update > Specify intranet Microsoft update service location“

Windows 11
“Computer Configuration > Administrative Templates > Windows Component > Windows Update > Manage updates offered from Windows Server Update Service > Specify intranet Microsoft update service location“

Then double click to open it and set the configuration to “Enable“. Next, provide the URL address of the WSUS Server as follows.

If you use a domain in the network you are using, you can simply set it up through Group Policy Management on the Domain Server. You can follow our other articles on how to use a GPO on a Domain Server. User GPO