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In my company, IT has blocked the use of Windows Live Messenger client, but I am able to log in to Web Messenger just fine.
When I try to sign in to the same Live ID via Zune Desktop software (latest version, with all patches applied) on Windows 7 Professional 64-bit, it fails with a generic error code C00D11CD. The "web help" page is here and provides no real help nor resolution.
I suspect Zune Desktop mimics WLM then and since that protocol/port is blocked, I cannot sign in from the desktop software? Anything else I can check/fix to successfully log in?