Problem solve Get help with specific problems with your technologies, process and projects.

When do you need SAN fields for the OCS Pool Certificate?

Unified communications integration and collaboration thought leader Hugh Marlor details the circumstances under which you need to use Subject Alternate Name (SAN) fields for the Office Communications Server (OCS) Pool Certificate.

When do you need SAN fields for the OCS Pool Certificate?

When planning for the deployment of certificates in an Office Communications Server (OCS) Pool, you should pay special attention to the use of the SAN (Subject Alternate Name) fields. There is no mention when deploying external web conferencing that you must include the FQDN of each FE server in the SAN field of the OCS Pool cert.

This is because the access edge servers connect directly to the FQDNs of the OCS FE servers when external users join a meeting. The OCS R2 Enterprise Edition Deployment Guide indicates that SAN fields are only required for multiple SIP domains.

In the recently released Microsoft Certificate deployment document, it states that wildcards are allowed in the SAN fields of OCS Pool certs. The truth is that if you are supporting web conferencing from the public internet then your OCS pool certificate must contain in the SAN fields the FQDNs of each FE server. If you use wildcards in the SAN fields, the OCS services won't even start.

Dig Deeper on Unified Communications Integration and Interoperability

Have a question for an expert?

Please add a title for your question

Get answers from a TechTarget expert on whatever's puzzling you.

You will be able to add details on the next page.

Start the conversation

Send me notifications when other members comment.

Please create a username to comment.