We will locate the cert by its thumbprint.

Add a Root ViewModelColumn of type string called 'ClientCertThumbPrint' (case sensitive) and provide the thumbprint in the ViewModel that use restGet, restPost or SoapCall

On prem servers : you have installed the cert on the server machine(s) that need to use it.

On Azure: You upload cert + must create app setting as explained here https://azure.microsoft.com/sv-se/blog/using-certificates-in-azure-websites-applications/

We will look in X509Store(StoreName.My, StoreLocation.CurrentUser); make sure you add the cert to the user running your service.