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Learn how to install, reinstall, or activate Microsoft 365 or Office 2019 on a PC or Mac.

Applies To: Office 2021, Office 2021 for Mac, Office 2019, Office 2019 for Mac, Microsoft 365 for home, Office for business, Office 365 Small Business, Microsoft 365 admin, Office 365 operated by 21Vianet, Office 365 operated by 21Vianet - Admin, Microsoft 365 for Mac, Office 365 Germany - Enterprise, Office 365 Germany - Enterprise admin

How to recall and/or replace an email message you sent by using Microsoft 365 and your built-in Exchange Server account.

Applies To: Outlook for Microsoft 365, Outlook 2021, Outlook 2019, Outlook 2016, Microsoft 365 admin, Outlook on the web, Outlook.com, New Outlook for Windows

Learn about Windows 11 minimum system requirements and how to assess your upgrade eligibility.

Learn how to connect a Bluetooth device in Windows and adjust Bluetooth pairing settings.

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

Applies To: Outlook for Microsoft 365, Outlook 2021, Outlook 2019, Outlook 2016, Microsoft 365 admin

Learn how to add user accounts in Windows 10 and Windows 11. With an account, each person has separate files, browser favorites, and a private desktop.

Learn how to find a Windows product key for activation, and when you'll use a digital license instead.

Applies To: Microsoft account dashboard

Learn how to upgrade from Windows 10 Home to Windows 10 Pro or Windows 11 Home to Windows 11 Pro, including how to use a valid product key or the Microsoft Store.

Si vous ne parvenez pas à vous connecter à votre compte de messagerie Outlook.com, Hotmail, Live ou MSN, ou si vous ne savez pas comment vous connecter ou vous déconnecter, voici quelques solutions.

Applies To: Outlook.com

Check the Xbox services, games, and apps for any service outages.