Global Unified Communication as a Service (UCaaS) Market Size study, by Component (Telephony, Unified Messaging, Conferencing, Collaboration Platforms and Applications), Organization Size (Large Enterprises, Small and Medium Enterprises (SMEs)), by End-Users (BFSI, Telecom and IT, Consumer Goods and Retail, Healthcare, Public Sector and Utilities, Logistics and Transportation, Travel and Hospitality, Others), and Regional Forecasts 2021-2027.