Microsoft Teams Room is an additional Microsoft Teams product that brings video, audio, and content sharing to conference rooms. Each meeting room device, such as a Teams Rooms console,
Surface Hub, and Teams panel, needs a Teams Rooms license. Teams provides two licenses for Teams Rooms: Microsoft Teams Rooms Pro and Microsoft Teams Rooms Basic.
For more details about Teams Rooms licenses, you could refer to: https://learn.microsoft.com/en-us/microsoftteams/rooms/rooms-licensing
In short, adding licenses gives you the flexibility to add features only to the users in your organization who needs them. E3 licenses get best-in-class productivity apps and core security and
compliance features for your business. Microsoft 365 E5 adds capabilities for voice and analytics.
For more differences about Microsoft E3/E5 license, you could refer to: https://www.microsoft.com/en-us/microsoft-365/compare-microsoft-365-enterprise-plans
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