If you see the following error in the EAS Integration Service logs:
"An unsecured or incorrectly secured fault was received from the other party. See the inner FaultException for the fault code and detail. At least one security token in the message could not be validated."
Try the following:
- Add the client certificate to the Local Computer --> Trusted People store on the API server. A private key is not required for this process.
- If you are using username/password authentication, make sure the user's role does not have the "Remote Services - Security -Allow Remote Access " permission set.