I have removed the server and tried to re-add it with it's Public name. I have also checked the SSL Box (using port 8531), but getting the error:
Cannot Connect to 'UPDATE.DOMAIN.COM'. Please make sure the Post-Installation task is completed successfully in that server. If it was, please verify if the server is using another port og different Secure Sockets Layer (SSL) setting.
I am having the same problem. Have tried EVERYTHING. I can get SSL working with WSUS on 2008R2 no problem, so I know that to get it to work on server 2012 must require some level of tweaking. Also, once I enable SSL, even after rolling back changes, I cannot access the server anymore via the MMC (gives the error above)
I did the following steps to try and get it working (without any luck of course):
To configure SSL on the WSUS server by using IIS 7.0
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On the WSUS server, open Internet Information Services (IIS) Manager.
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Expand Sites, and then expand the Web site for the WSUS server. We recommend that you use the WSUS Administration custom Web site, but the default Web site might have been chosen when WSUS was being installed.
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Perform the following steps on the APIRemoting30, ClientWebService, DSSAuthWebService, ServerSyncWebService, and SimpleAuthWebService virtual directories that reside under the WSUS Web site.
- In Features View, double-click SSL Settings.
- On the SSL Settings page, select the Require SSL checkbox. Ensure that Client certificates is set to Ignore.
- In the Actions pane, click Apply.
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Close Internet Information Services (IIS) Manager.
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Run the following command from <WSUS Installation Folder>\Tools: WSUSUtil.exe configuressl <Intranet FQDN of the software update point site system>.