We just got 2 Surface Pro 3's in our office. We also just got docks on Friday for both. We're trying to plug in monitors through the mini displayport on the dock. Windows recognizes something is plugged in, but you can never get video through it. If I plug the same monitor to the mini displayport on the Surface itself, it works fine. I have verified this behavior with 2 different surfaces and 2 different docks. I have tried 2 monitors and one TV. I have tried a mini displayport cable to HDMI to go into a TV and a mini displayport to displayport cable. Any ideas?