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What is Phone System in Office 365? | Microsoft Docs

What is Phone System in Office 365? 10/17/2019; 4 minutes to read +5; Applies to: Skype for Business, Microsoft Teams; In this article. Phone System is the Microsoft technology for enabling call control and PBX capabilities in the Office 365 cloud with Skype for Business Online and Microsoft Teams. Phone System allows you to replace your existing PBX system with a set of features delivered ...