Learn how to set up your user account for multifactor authentication with Microsoft 365.

Play MP4 files in Windows 10 by right-clicking the file and choosing what application to open it with.

Decide which documents to recover from an unexpected close, delete recovered files you don't want, or close recovered files to review later.

Learn how to upgrade Windows 10 Home to Windows 10 Pro to access more advanced security and networking features.

If you see a gray OneDrive icon, this means you are not signed in. If you cannot sign in to your OneDrive sync app, or the sync app says OneDrive is not connected, follow the steps below.

Get to know your way around Windows 11, from where to search to how to stay organized. Watch the video and read tips about new features.

Admins set default meeting settings. They try to optimize for most use cases, but if you want to adjust your options for a specific Teams meeting, go to Meeting options.

How to calculate the number of days, months, or years between two dates using the DATEIF function in Excel.

You can send a meeting request to one or more people. Outlook reserves time on your calendar for the meeting and tracks who accepts the invitation.

Learn how to add user accounts in Windows 10 and Windows 11. With an account, each person has separate files, browser favorites, and a private desktop.