Office 2019 is now available as a one-time purchase for commercial and consumer users. Office 2019 is available for both Windows and macOS, and includes classic versions of Word, Excel, PowerPoint, and Outlook.

If you have trouble getting things working when you try to connect Surface to an external display, try these solutions to help fix the problem.

Use date and time functions to create formulas that return serial numbers, display a specific date or time, or that calculate the difference between dates or times.

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.

Add or change headers and footers in Excel. Add the date, time, page numbers, filename or any other text.

Training: Watch and learn how to use OneDrive to upload, store, edit, and share your files.

注: 最近 Windows 10 を更新して、ファイルを見つけるのに問題が生じている場合は、「Windows 10 へのアップグレード後に失われたファイルを検索する方法」をご覧ください。

Sign in to account.microsoft.com, then select Order History on your Rewards page.

Know which environment you're in Power Query is well-integrated into the Excel user interface, especially when you import data, work with connections, and edit Pivot Tables, Excel tables, and named ranges. To avoid confusion, it’s important to know which environment you are currently in, Excel or Power Query, at any point in time.

Learn about Teams, SharePoint and OneDrive, and what to use when, for team collaboration and file storage.