You can configure Windows to use only certain cipher suites during things like Remote Desktop sessions. Cipher suites such as RC4 56 bit, RC4 128 bit, Triple DES 168 bit, etc.
SSL/TLS is not in play here so I'm talking about RDP encryption.
You can see what I'm talking about here.
I thought to run a packet capture using Wireshark or Network Monitor while I connected to a computer across the network, but I cannot see anywhere in the packet capture the bits I need to verify exactly which cipher suite it is using.