Universal Containers (UC) wants its closed Won opportunities to be synced to a Data warehouse...

The default client certificate or the certificate from the Certificate and Key Management menu is sent along with the outbound message. When sending outbound messages, Salesforce will present the CA-signed or self-signed certificate configured underSetup | Security Controls | Certificate and KeyManagement | API Client Certificate1. The default client certificate is a self-signed certificate that Salesforce generates for you when you enable outbound messages2. You can also create your own self-signed or CA-signed certificates and upload themto the Certificate and Key Management menu3. The certificate from the Develop | API menu is not usedfor outbound messages, but for SOAP API clients that need to authenticate with Salesforce4.References: 1: Know more about all the SSL certificates that are supported by Salesforce 2: Setting Up Outbound Messaging 3: Create a Self-Signed Certificate 4: [Generate or Regenerate a Client Certificate]