Find everything you need to manage your Xbox account, profile, and more.

Learn how to set up and configure Outlook so that you can begin to use it.

How to send automatic out-of-office replies from Outlook (depending on the type of email account you have).

Search for files. Looking for an older file? Search is a powerful tool to find all your online files. Type a word or phrase in the Search box.

Training: Get started with SharePoint in Microsoft 365. At office.com, sign in to SharePoint, then select the SharePoint tile.

Get help with signing in, changing passwords, creating and sending mail, deleting mail, creating folders, and more in Outlook on the web.

使用双重验证时，Microsoft Authenticator 应用可帮助你登录帐户。

Welcome to Sticky Notes! We're still the best way to write quick notes on your Windows desktop, but now you can also take your sticky notes with you, allowing you to capture, find, and use your notes across apps and your favorite devices.

回復ドライブを使用して PC にWindows 11を再インストールする必要がある場合は、Windows の回復オプションに関するページを参照してください。 回復ドライブはシステム イメージではないので、Windows PC を頻繁にバックアップすることをお勧めします。 個人用ファイル、設定、プログラムは回復 ...

How to use the SUMIF function in Excel to add the values in a range that meet criteria that you specify.