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by k33l0r 5305 days ago
They use a proprietary authentication mechanism, so you can't just use any XMPP client...

The client-to-server authentication used is SASL, with a specific and proprietary mechanism called X_MESSENGER_OAUTH2. ... Which means that all current XMPP clients are NOT able to connect to messenger.live.com.

http://www.process-one.net/en/blogs/article/details_on_msns_...