Server Name Invocation with TLS

Hi

I have a .Net client programm running on Windows Server 2008. The programm communicates with a third party server using TLS. The owner of the server gives us a new requirement that the client has to use TLS withServer Name Invocation (SNI). I have checked that Winserver 2008 doesn't support SNI. 

I would like to install a library (for example OpenSSL) that supports SNI and then allow all communication from my server over OpenSSL. Is it possible? If yes what steps should I make?

If it is not possible to use OpenSSL instead of build-in functionallity of TLS in Win Server I need to make changes directly in the programm code to use OpenSSL for each client programm separately. This requires much more work. 

Thank you