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Sign in to Microsoft 365 With Microsoft 365, you can install Microsoft 365 or Office on all your devices and sign in to Office on five devices at the same time This includes any combination of PCs, Macs, tablets, and phones
Microsoft Office is part of Microsoft 365 Office is now Microsoft 365, the premier productivity suite with innovative productivity apps, intelligent cloud services, and world-class security Office com, the Office mobile app, and the Office app for Windows are combined in the Microsoft 365 Copilot app—with a new icon, new look, and even more features