Holotoolkit Sharing with UNET example

I downloaded the Holotoolkit and loaded the example scene, sharingwithUnet, immediately into Unity and built/deployed to my HoloLens. I have another HoloLens as well running the same scene. However, the two HoloLens never find each other and set themselves both as a server. Is there a reason this is happening? Am I missing something? Or is there a way to change one of them to a client?

I have tried posting to the Microsoft forum but, it is very dead. Maybe someone on here can help.

Solved. Firewall was preventing HoloLens from connecting with one another.