This little tool should make a lot of administrators much happier.
We are pleased to announce the general availability of vCenter Certificate Automation Tool 1.0. This tool provides an automated mechanism to replace certificates in the following components of the vCenter Server 5.1 management platform:
The tool is available now and can be downloaded for free from the VMware download website
For more information on how to install, and use the tool, refer to KB article: Deploying and Using the SSL Certificate Automation Tool (2041600).
This tool is fully supported by VMware.
Let me know if this works for you!