Gartner defines unified communications as a service (UCaaS) as a multitenant, subscription-based service. It is cloud-delivered. It provides business telephony features; external, public switched telephone network (PSTN) connectivity that enables inbound or outbound calling; and collaboration features, such as messaging and meetings. UCaaS services can be consumed by end users with traditional handsets, desktop clients, meeting room systems and mobile apps. Gartner’s definition of meetings for the UCaaS market focuses on the capabilities for internal collaboration, work from home and external presentation meeting use cases only. Other specialized use cases, such as webinar, remote support, distance learning and training, are often available from UCaaS offerings.