SSL Certificate Installation in OCS 2007 Server
How to install your Certificate to your Windows Office Communications 2007 Server
Open the ZIP file containing your certificate. Copy your_domain_name.cer the Office Communications Server where you you generated the CSR.
On the server click Start, then Programs, then Administrative Tools, and then click Office Communications Server 2007.
Expand the snap-in until you find the Enterprise Edition Server.
Right click on the Office Communications Server where the CSR was generated previously, and click Certificates.
Click "Next", then chose to "Process the pending request and install the certificate".
Browse to your_domain_name.cer and click Next. This will install the certificate. You can view the certificate and close the certificate wizard.
Your SSL Certificate is now installed and ready to use.
For more information, see Microsoft's official Office Communications Server documentation, located at http://r.office.microsoft.com/r/rlidOCS?clid=1033&p1=library
SSL Certificates :: Microsoft Office Communications Server 2007
How to install your SSL Certificate to your Windows Office Communications Server.