You might generate a new HTTPS security certificate for multiple reasons, including if you want to sign with a different Certificate Authority or if the current security certificate has expired. The new certificate replaces the existing certificate.
After generating a new certificate, you can verify the new certificate information by viewing the HTTPS certificate.
If you need to reactivate performance monitoring updates from Performance Manager servers to the Unified Manager server, you must delete the connections that were invalidated by this task and reconfigure new connections.