By default the Windows Server operating system contains very few Trusted Root Certification Authority certificates. In this case, Windows Server 2016, the certificate store contains just sixteen CA root certificates, which leads to trust issues when browsing public and third-party websites using Internet Explorer hosted on Citrix XenApp Virtual Delivery Agents. May 02, 2019 · C# code for your solution. Below you can find a class called Authorization which contains methods for getting an access token with a certificate. The code fetches the certificate from the web app store using the thumbprint when it is run in Azure, but if you are debugging the code locally, it will use the certificate (.pfx) file from your local folder.