Recover and restore deleted items in Outlook - Microsoft Support
Learn how to recover deleted items, such as email, contacts, calendar appointments, and tasks in Outlook.
Applies To:
Outlook for Microsoft 365, Outlook 2021, Outlook 2019, Outlook 2016, Outlook on the web, Office 365 operated by 21Vianet, Outlook.com, New Outlook for Windows
COUNTIF function - Microsoft Support
How to use the COUNTIF function in Excel to count the number of cells that meet values you set.
Applies To:
Excel for Microsoft 365, Excel for Microsoft 365 for Mac, Excel for the web, Excel 2021, Excel 2021 for Mac, Excel 2019, Excel 2019 for Mac, Excel 2016
Find your Windows product key - Microsoft Support
Learn how to find a Windows product key for activation, and when you'll use a digital license instead.
Applies To:
Microsoft account dashboard
Export emails, contacts, and calendar items to Outlook using a .pst ...
Export Outlook email, contacts, and calendar to move them to another computer or so that you can make a backup of your information.
Applies To:
Outlook for Microsoft 365, Outlook 2021, Outlook 2019, Outlook 2016, Microsoft 365 admin
在 Windows 中查找 BitLocker 恢复密钥 - Microsoft 支持
了解在 Windows 中查找 BitLocker 恢复密钥的不同方法，并了解如何在系统上激活 BitLocker。
Microsoft Edge の閲覧履歴を表示または削除する - Microsoft サポート
Microsoft Edge で、閲覧履歴やその他の履歴を表示したり削除したりする方法について説明します。
Windows 11 System Requirements - Microsoft Support
Learn about Windows 11 minimum system requirements and how to assess your upgrade eligibility.
Activate Windows - Microsoft Support
Learn how to activate Windows using a product key or digital license, check your activation status, and link your Microsoft account.
Block or allow (junk email settings) - Microsoft Support
Use the Block or Allow settings in Outlook Web App to help control unwanted and unsolicited email messages.
Applies To:
Outlook on the web for Exchange Server 2016, Outlook on the web for Exchange Server 2019, Outlook Web App
Herunterladen und Installieren bzw. erneutes Installieren von Office ...
Erfahren Sie, wie Sie Office 2013 auf Ihrem PC oder Office für Mac 2011 installieren können.
Applies To:
Office 2019, Office 2016, Office 2016 for Mac, Office 2013