The Microsoft 365 app for Windows is a free app that you can use with Microsoft 365 for the web, Office 2019, or Microsoft 365 subscriptions.
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Easily switch between apps - View and open all your apps in one place and switch between them with a single click.
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Quickly get back into your work - Upload files to OneDrive and pin them so they're easy to get to. Jump to your most recently used documents, and files shared with you—whether they’re on your computer or stored in OneDrive or SharePoint.
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Find what you need faster - With Microsoft Search integrated prominently, you can quickly find the apps, documents, people, and sites you need to get your work done.
Simply open the app from the Start menu, and sign in with your Microsoft account, or work or school account to get started.
Why did www.microsoft365.com or the Microsoft 365 app open automatically?
The keyboard shortcut combination Ctrl+Shift+Alt+Win opens the Microsoft 365 app or www.microsoft365.com. Sometimes existing shortcuts, macros, and even drivers use this same keyboard shortcut combination. If you've relied on the Ctrl+Shift+Alt+Win shortcut to perform other actions in the past, you'll notice that using it launches Microsoft 365 now.
What's the difference between Microsoft 365 and Office 2019?
