After changing the NS WebSite certification the Sym Agent machines are unable to update their configuration and the following error is returned:
fail to update configuration. Error: A certificate chain processed, but terminated in a root certificate which is not trusted by the trust provider.
ITMS 8.x
In this case, the certificate was a self-signed cert created on the Notification Server. But the issue is caused by an internal company policy (Group Policy) bring tun that prohibits using self-signed certificates. This causes the root certificate or higher domain certificates are not installed or trusted.
1- Remove the GPO to allow self-signed certificates to be used.
2- Install the root certificate on the computer and make sure all certificates including the root and other ones are installed in the trusted root.
*If the issue is just on one or a few agents, you can export the NS Certificate from another computer and import/install it on the trusted root certificate on the client.