Learn how to manage and set device screen time limits on Windows, Xbox, and mobile devices connected through the Microsoft Family Safety app.

Some extensions change browser settings like your default search engine, new tab page, and other types of site data. To prevent extensions from changing the preferences you set up when you installed Microsoft Edge , the browser automatically turns off extensions that might change your preferred settings.. You can change settings for your extensions at any time.

Learn about the different types of codes you can use to purchase Xbox content and subscriptions.

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Get the latest info on new features for Microsoft Teams with these regularly updated release notes.

了解如何打开 Xbox 订阅的定期计费以使订阅自动续订。

Earn a Microsoft Office Specialist (MOS) certification. Microsoft Office Specialist--Pass an exam in a specific Office program to earn a Microsoft Office Specialist certification.Being certified as a Microsoft Office Specialist demonstrates you have the skills needed to get the most out of Office.

How to use the COUNTIFS function in Excel to apply criteria to cells, across multiple ranges, and count the number of times all criteria are met.

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How to use the SUMIFS function in Excel, one of Excel’s math and trig functions, to add arguments that meet multiple criteria.