When you enable an add-in, it adds custom commands and new features to Microsoft 365 programs that help increase your productivity. Because add-ins can be used by attackers to do harm to your computer, you can use add-in security settings to help protect yourself.

Use an add-in while composing a message. Create a new message or reply to an existing one. From the ribbon, select the Message tab, then choose the add-in you want to use. If the add-in doesn’t appear in the ribbon, select Apps to view your installed add-ins.

Add-ins provide optional commands and features for Microsoft Excel. By default, add-ins are not immediately available in Excel, so you must first install and (in some cases) activate these add-ins so that you can use them. Some add-ins are built in to Excel, such as Solver and the Analysis ToolPak.

If you want to sign in on a remote computer to install Authenticator, follow these steps. Note: This feature is usable only by users whose admins have enabled remote sign-in. Open Authenticator, and then select > Add work or school account > Sign in. Select Sign in from another device.

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

Use the Office offline installer to install Office 2016 or Office 2013 if you don't have an active Internet connection or you're having problems with slow speed or unreliable connections.

Change from a 32-bit version to a 64-bit version or vice versa. Activate Windows. Fix Bluetooth problems in Windows. Learn how to install, reinstall, or activate Microsoft 365 or Office 2019 on a PC or Mac.

Check here for the known game issues that we're currently tracking and find out what you can do about them. Need help with an Xbox console, an Xbox game, or Xbox network? Find out how to get in touch with us.

Learn how to download, install, and configure Language Accessory Packs for Microsoft 365 to add additional display, help, and proofing tools to Microsoft 365.

We understand that sometimes purchases of digital game products don’t go as planned. When that happens, we’ll help you request a refund. Refunds are typically issued for requests meeting the following criteria: Requests are made within 14 days of the purchase date.