Documentation forNetwork Performance Monitor
Monitoring network performance is a key capability of SolarWinds Observability Self-Hosted (formerly Hybrid Cloud Observability) and is available in the Essentials edition. Network Performance Monitor (NPM) is also available in a standalone module.

Certificates and the agent in the SolarWinds Platform

The Verisign Root Certificate Authority (CA) must be current. This is required because the agent software is signed using a Verisign certificate. If your certificate is not current, you must download the Root CA certificate and install it to the Local Computer\Trusted Root Certification Authority store on the server hosting the agent.

For more information, search for "Add the Certificates Snap-in to an MMC" at technet.microsoft.com.