While add-ins are accessed from the ribbon or app bar in classic Outlook, access to add-ins in new Outlook for Windows depends on whether you're reading or composing a mail item. For guidance on how to use add-ins in classic Outlook, see Use add-ins in Outlook.

The Program Install and Uninstall troubleshooter helps you automatically repair issues when you're blocked from installing or removing programs.

Add-ins can add a lot of functionality to Microsoft 365, but they are often used by people with bad intentions to distribute malware to unsuspecting victims. Add-ins aren't required for everyday use like reading or editing Excel workbooks.

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

Select the tile for the member’s account that you want to manage, and then select the Settings icon in the top-right corner of the screen.; Select the Settings icon at the bottom of the Family screen, and then select the tile for the member’s account that you want to manage.

Learn how to configure your family group member’s settings so that they can play Minecraft safely by using the Xbox Family Settings app or Xbox console.

Outlook add-ins provide solutions to help you better interact with Outlook and complete tasks on your messages and appointments without leaving Outlook. Install an add-in from AppSource. From the Tools menu on the ribbon in Outlook, select Get Add-ins. The AppSource page opens in your default browser.

When you select the Import Settings option during setup, the web add-in counterparts of your existing COM add-ins in classic Outlook for Windows are installed in the new client. The following table lists the applicable COM add-ins and their web add-in counterparts.

选择“ 获取 Microsoft Edge 的扩展”。 查找要添加的扩展，然后选择“获取”。 当系统显示扩展所需权限提示时，仔细查看权限，然后选择“添加扩展”（如果要继续）。 你将看到一条确认扩展已添加的最终提示。

Add-ins in Outlook.com are programs or utilities that help you automate tasks when you view or create messages. Microsoft has partnered with leading companies to build add-ins that help you get things done right from your inbox.