1. A method at least partially executed on a computing device for facilitating communication sessions in a uniform communication and collaboration (UC&C) aware network, the method comprising: detecting a request for a communication session; during a discovery of potential media paths between a source and a destination for facilitating the communication session, detecting whether each discovered potential media path supports Quality of Service (QoS); if one or more potential media paths support QoS, prioritizing the media paths that support QoS; and if a potential media path does not support QoS, designating that media path as a last resort media path.