Get info on how to find your IP address in Windows. Communities help you ask and answer questions, give feedback, and hear from experts with rich knowledge.

如何将 IF 函数 (与 Excel 中) AND、OR 和 NOT 函数结合使用，以在给定值之间进行逻辑比较。

Describes MSN support options and how to contact MSN Customer Support.

Disk Management in Windows helps you perform advanced storage tasks like initializing a new drive and extending or shrinking volumes.

Discover the new features and improved communication methods in Outlook 2021 for Windows.

Learn how to activate Windows using an internet connection, automated system, or live support advocate.

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.

Training: Get productive quickly with our Outlook Quick Start. Learn how to create and send email, and use @mentions to get someone's attention.

Microsoft's products and services work best if you use the same language and region across all your devices, and in all of your app and Store settings.

How to create, edit, and run Excel macros to automate data entry and tasks.