Some clients point to Selfupdate on HTTPS

Hi,

We are trying to fix a good number of clients in our environment who are not reporting to the WSUS server for a long time. All seem to have a common error 

WARNING: WinHttp: SendRequestUsingProxy failed for <https://xxxx.yyyy.net/selfupdate/wuident.cab>. error 0x80072f8f

Checked IIS for selfupdate and SSL is not enabled

Certificates are fine. Most clients are getting updates.

Time is not an issue. 

Selfupdate works on port 80 but gives certificate error on 443 which is why I think the error. How do we make the clients point to Selfupdate using port 80 rather than using port 443.

Any help would be appreciated.

Regards,

Vijay