.net 4.0.3 64 app issuing TLS 1.2 messages

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  I notice strange behavior on Windows Server 2012 R2.

  I have .net 4.0.3 64 bit apps that using HTTPS to communicate with each other. As far as I know, and according to documentation .net 4.0.3 supports only TLS 1.0. 

  But, .net 4.0.3 64 bit client is sending TLS 1.2 messages.

  Another thing that I noticed is, when I compile the same app to 32 bit, it is issuing TLS 1.0 messages.

  The apps are WCF cleint (meaning using proxy base classes System.Service.dll) <-> WCF server.

  Do you have any Idea what is going on?

  • Moved by Dave PatrickMVP Tuesday, February 2, 2016 1:41 PM

  Tuesday, February 2, 2016 1:10 PM