The document summarizes the strengths and cautions of leading UC&C (Unified Communications & Collaboration) vendors based on an annual industry summit. Key highlights include the UC product market becoming more mature with a shift to cloud services continuing. New areas in 2017 included CPaaS (Communications Platform as a Service), workstream messaging, and video conferencing. Individual vendor summaries then covered their strengths, cautions, and market positioning. The document provided an overview of the competitive UC&C landscape and major trends in the industry.