“Could not create SSL/TLS secure channel” in an Azure Web Application

Question

My Azure Web Application needs to connect to various servers (both with and without SSL). This works perfectly as long as I run the application in my local IIS Express or II

Answer 1

Perhaps SSL3 or Tls1.0 are not supported? I had a similar issue and after switching to this everything worked:

ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12

You can use ssllabs to test which protocols the server you are trying to connect to uses.

https://www.ssllabs.com/ssltest/