Article ID: 2855339 - View products that this article applies to.
The Lync Online Service is migrating to a new trusted root certificate authority between April and June 2013. This update may cause secure connectivity issues with client computers that do not support the Baltimore CyberTrust Root certificate authority root certificate.
Client computers will no longer be able to perform secure connections to the Lync Online Service using the GTE CyberTrust certificate authority root certificate after April 2013. The new Baltimore CyberTrust Root certificate authority root certificate is mandated by the third party root provider to address security and compliance concerns for secure client connections to the Lync Online Service. All client computers that connect to the Lync Online Service should have a copy of the Baltimore CyberTrust Root certificate authority root certificate installed locally in their Trusted Root Certifications Authorities Certificates store.
For detailed information about Windows Root Certificate Program information:
(http://support.microsoft.com/kb/931125)Windows Root Certificate Program members
The secure connectivity issues with the Lync Online Service that are described in the Summary section of this article can occur at the level of the local computer. Use the following steps to confirm that the Baltimore CyberTrust Root certificate authority root certificate is properly installed on the client computer to ensure a secure connection to the Lync Online Service:
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If the Baltimore CyberTrust Root certificate authority root certificate is not listed in the Local Computer Trusted Root Certifications Authorities Certificates store then use the following steps to download and install the certificate onto the Windows server or client computer:
(http://go.microsoft.com/fwlink/?LinkId=151500)for other considerations.