How to use the FILTER function in Excel to filter a range of data based on criteria you define.

Learn how to troubleshoot and fix problems setting up your email in Outlook.

从确保设备可以运行 Windows 11 到备份文件和安装 Windows 11，了解如何为 Windows 11 升级做好准备。

Contact groups, or distribution lists, are a fast way to send a message to multiple email recipients, especially groups you repeatedly contact.

Whether you’re starting from a Microsoft template or updating one of your own, Word's built-in tools help you update templates to suit your needs. To update your template, open the file, make the changes you want, and then save the template. In Microsoft Word, you can create a template by saving a document as a .dotx file, .dot file, or a .dotm fie (a .dotm file type allows you to enable ...

Create Outlook Data Files (.pst) on your computer to save Outlook items by account, project, or to archive older items.

If you cannot open your Outlook data file or suspect that the file is damaged, use the Inbox Repair tool (scanpst.exe) to repair errors in the file.

Learn how to tell if your Office software is genuine. To help determine if your Microsoft software is genuine, go to our How to Tell site for more information. Here you'll learn about authentic packaging, including what to look for with product key labels, and Certificate of Authenticity (COA), how to report counterfeit software, and find out what your shopping and licensing options are.

Choose how you want emails displayed in the message list, such as whether you want emails displayed as individual messages or as conversations.

You can undo, redo, or repeat many actions in Microsoft Word, PowerPoint, and Excel. You can undo changes, even after you have saved, and then save again, as long as you are within the undo limits (By default Office saves the last 100 undoable actions).