If you have IIS configured correctly, you should be able to hit the client web service. Run through my guide.
https://www.ajtek.ca/wsus/client-machines-not-reporting-to-wsus-properly/
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I build WSUS on workgroup to serve update to workgroup server. I configure the group policy from one workgroup server to connect to the WSUS but the server not detected on WSUS.
I try open http://wsus:8530 from browser then the browser is asking the credential. It's normal behavior we need credential when accessing thru browser?
If you have IIS configured correctly, you should be able to hit the client web service. Run through my guide.
https://www.ajtek.ca/wsus/client-machines-not-reporting-to-wsus-properly/
AI answer
Yes. A browser prompt for credentials when opening http://wsus:8530 can be normal, and browsing to WSUS URLs is not a reliable validation method by itself. The documented guidance notes that accessing most WSUS URLs in a browser returns a 403 error, so browser behavior alone does not confirm whether the client is correctly configured.
For a workgroup server, the key requirement is that each client must be configured locally, because without Active Directory there is no domain GPO targeting. Use the Local Group Policy Editor on the workgroup server and configure:
http://Your_WSUS_Server_FQDN:8530
or, if using HTTPS,
https://Your_WSUS_Server_FQDN:8531Important checks for this scenario:
Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate
Confirm the WSUS server FQDN is set there.c:\inetpub\logfiles.
If WSUS is secured with TLS, do not require TLS for the entire WSUS website. WSUS is designed to use HTTPS for update metadata and HTTP for update payloads by default. Also, the CA certificate must be imported into the Trusted Root CA store for the local computer on each WSUS server.