Managed Communication Service Market Size and Forecasts (2020 - 2030), Global and Regional Share, Trends, and Growth Opportunity Analysis Report Coverage: By Type (Unified Communication, E-mail, VoIP, Others); Deployment Type (On-Premises, Cloud); End-Users (Retail, BFSI, Healthcare, Public Sector, Others) , and Geography (North America, Europe, Asia Pacific, and South and Central America)