PKI Support
Microsoft Office Communications Server 2007 and Microsoft Office Communications Server 2007 R2 will reach end of support on January 9, 2018. To stay supported, you will need to upgrade. For more information, see Resources to help you upgrade your Office 2007 servers and clients.
A PKI (public key infrastructure) is required. Certificates that are issued from the following types of CAs (certification authorities) are supported, depending upon the requirement:
Certificates issued from an internal CA
Windows Server 2003 SP1 Enterprise CA (recommended)
Windows Server 2003 SP1 Standalone CA (supported, but not recommended)
Certificates issued from a public CA
Communicator Web Access MTLS certificates must be issued by the same CA that issued the MTLS certificates for the Office Communications Server 2007 server or servers.
Note
Office Communications Server 2007 will support certificates with a length of up to 1024 bits.
Office Communications Server 2007 server certificates must be configured with an enhanced key usage (EKU) extension for server authentication.
For the MSN® network of Internet services and for Yahoo!®, a Web server certificate is required. For AOL®, the certificate must also be configured for client authentication. For federation and public IM connectivity, a certificate that is issued by a public CA is required. Public IM connectivity requires an additional license.
For a list of public certificate authorities who have partnered with Microsoft to ensure that their certificates comply with specific requirements for Office Communications Server, see https://r.office.microsoft.com/r/rlidOCS?clid=1033&p1=SupportedCAs.
For specific certificate support and requirements, see the following documents:
Microsoft Office Communications Server 2007 Planning Guide
Microsoft Office Communications Server 2007 Standard Edition Deployment Guide
Microsoft Office Communications Server 2007 Enterprise Edition Deployment Guide
Microsoft Office Communications Server 2007 Edge Server Deployment Guide
Microsoft Office Communicator Web Access (2007 release) Planning and Deployment Guide