To communicate with a vendor provider, the vCenter Server uses a secure SSL connection. The SSL authentication mechanism requires that both parties, the vCenter Server and the vendor provider, exchange SSL certificates and add them to their truststores.

The vCenter Server can add the vendor provider certificate to its truststore as part of the vendor provider installation. If the certificate is not added during the installation, use one of the following methods to add it when registering the vendor provider:

Direct the vCenter Server to the vendor provider certificate. In the Add Vendor Provider dialog box, select the Use Vendor Provider Certificate option and specify the certificate's location.

Use a thumbprint of the vendor provider certificate. If you do not direct the vCenter Server to use the provider certificate, the vSphere Client displays the certificate thumbprint. You can check the thumbprint and approve it. The vCenter Server adds the certificate to the truststore and proceeds with the connection.

The vendor provider adds the vCenter Server certificate to its truststore when the vCenter Server first connects to the provider.