While upgrading one of my Exchange lab servers I was presented with the error, “The certificate is expired.”
This error occurred while setup was installing the transport service and it was blocking the install from completing. Further investigation of the event logs indicated that the transport certificate had expired (Event ID 12015). This made sense why the setup was failing during that step.
The challenge here was the Exchange Admin Center would no longer load. Luckily, the Exchange Management Shell was still operational. The following are the steps to renew a certificate using the Exchange Management Shell. I have included instructions for renewing both a self-signed and third-party certificate. Once renewed setup will complete. If you have multiple Exchange servers in your lab it is also possible to do this task remotely against the problem server.[Read more…] about Error installing Exchange update – The certificate is expired