What Service Patch is required to enable TLS 1.2 for Windows Server 2008 R2

What Service Patch is required to enable TLS 1.2 for Windows Server 2008 R2

The TLS 1.2 protocol by default was disabled in Windows 7 and Windows Server 2008 R2.  However, it was made available on Windows Server 2008 SP2, which was released on July 18th, 2017.  In order to enable this feature, you must first download and install the Windows Server 2008 SP2.  Afterward, you can then enable the TLS 1.2 protocol by setting the registry keys described in this Microsoft Support KB4019276 article.
Note: if your source machine does not have the identical protocol installed as the target machine, it is more than likely that the connection will be refused or will not respond in a timely manner.  We recommend using Wireshark or Fiddler to troubleshoot and analyze issues with your network and/or communication protocols.