When using SWG as the HTTP and HTTPS proxy, Windows Live Messenger(MSN) 2009 cannot sign in.
The error code may be 80048820, 80048861 or 80072f0d.
In IE Advanced settings, cleared the tick of the checkbox that says “Check for server certificate revocation”.
Ticking “Use SSL 2.0” and “Use SSL 3.0” checkboxes is to follow.
And then, test again, still have the same issue.
The WLM won't accept the SWG default certificate because the certificate is not signed by a Trusted Root Certification Authorites.
Moreover, the certificate issue may also lead to other applications cannot across through SWG with SSL proxy. A known application is Evernote.
There are two ways to resolve the issue: