I've download a trail version shavlik for SCCM 2012 ,and follow the artilce “How to configure IIS to use SSL connections on your WSUS server” to change my WSUS from http to https.
test WSUS connect with SSL success, but when i try to import the Certificate or choose "create a self-signed certificate", always got an error.
by the way my account is the domian adms and also the member of WSUS Administrators group.
Fixed, after run as administrator.
Thanks for taking the time to post your fix.
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