Microsoft has partnered with leading companies to build programs that help you get things done right from your inbox. These programs are called Office Add-ins in Outlook 2016, and Apps for Office in Outlook 2013, and help you speed up the way you access information on the web.
Important: New name for apps for Office - Office Add-ins. We are currently updating our products, documentation, samples, and other resources to reflect the platform name change from "apps for Office and SharePoint" to "Office and SharePoint Add-ins". We made this change to better distinguish the extension platform from Office apps (applications). While these changes are taking place, the dialogs and messages you see in your application might be different than what you see in this article.
For example, the Bing Maps add-in, becomes available in an email that contains an address, and you can use it to check the online map for that location right from your email.
Some add-ins are installed by your email administrator, but you can install other ones from the Office Store.
Install an add-in from the Office Store
In Outlook, click Home > Store on the ribbon.
Select an add-in that you want, and then select Add or Buy to download it.
When the add-in is installed, go to File > Manage Add-ins or Manage Apps to make sure it's turned on. When you’re prompted to sign in, type the email address and password you use to sign in to Office programs.
Note: If you don’t see the Manage add-ins (or Manage Apps) button, you won’t be able to get add-ins for Outlook. To get them, you’ll need Office 2013 or 2016 and Exchange 2013 or 2016, and your administrator needs to activate add-ins for Outlook.
Use an add-in for Outlook
The add-ins automatically appear in a gray bar near the top of the message when there is data in the email that is related to the add-in.
For example, when you open an email message that has a street address, the Bing Maps add-in automatically appears in the gray bar.
Choose the add-in to access the data it offers.
Manage your add-ins
Go to File > Manage Add-ins or Manage Apps. When you’re prompted to sign in, type the email address and password you use to sign in to Office programs.
Under Manage add-ins, click Find more add-ins for Outlook at the Office Store to go to the Office Store.
Use the options on the toolbar to uninstall an add-in, add more, or refresh the page to see a list of the latest add-ins. You can also activate or deactivate an add-in by checking or un-checking the box under Turned on.
Select an add-in to see more data on the right side of the window.
Tip: You can also use Outlook Web App to manage your add-ins. Choose Settings > Manage add-ins, on the top right corner of the page.