UCaaS: Microsoft Teams

Microsoft Teams is a workstream collaboration tool bundled with Microsoft/Office 365 licensing. Its features include persistent individual/group instant messaging, presence, audio/web/video meetings, file sharing, and (optionally) Cloud PBX to replace or augment an existing phone system. Microsoft partners with a large ecosystem of service providers who offer multiple ways to enable PSTN dialing, as alternatives to the basic Calling Plans available directly from Microsoft.