Warning: Excel provides the DATEDIF function in order to support older workbooks from Lotus 1-2-3.The DATEDIF function may calculate incorrect results under certain scenarios. Please see the known issues section of this article for further details.

Get help with your questions about the Photos app from our selection of how-to articles, tutorials, and support content.

Get answers to some basic questions about what two-step verification is, and how to set it up and use it to help keep your Microsoft account more secure.

Learn how to protect your PC, identity, and data from tech support scams.

Microsoft 365 helps you manage and share your work schedule. New features allow you to specify more details about your work schedule: from where you’re working (remotely or in office) and whether you work different hours on different days. In addition, you’ll be able to schedule meetings with others based on their work location and view work location on people’s contact cards.

Windows 11 でカメラが動作しない場合は、最近の更新後にドライバーがなくなっている可能性があります。 また、ウイルス対策プログラムによってカメラがブロックされている、一部のアプリでカメラへのアクセスが許可されていない、使用するアプリに問題があるなどの可能性もあります。

Learn how to join a Microsoft Teams meeting by link, calendar, channel, chat, or by calling in.

Using pages is a great way to share ideas using images, Excel, Word and PowerPoint documents, video, and more.You can create and publish pages quickly and easily, and they look great on any device.

Use data validation rules to control the type of data or the values that users enter into a cell. One example of validation is a drop-down list (also called a drop-down box or drop-down menu). Watch more in this video.

If there was an unusual sign-in attempt for your account, you'll get an email or text message. We'll send a message to all your alternate contact methods.