On June 8th, 2013, for Office Communications Server and Lync federation with Microsoft.com, Microsoft will replace the root certificate on the federation edge server from a GTE CyberTrust root to a Baltimore root.
By that date, any SIP domain federated with Microsoft must have the respective edge server’s trusted root certificate store updated with the Baltimore root certificate. Any edge server which does not trust the new Microsoft.com certificate by June 8, 2013 will be unable to connect...(read more)![]()
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