Get an Add-in (App) for Outlook
Microsoft has partnered with leading companies to build programs that help you get things done right from your inbox. These programs are called Add-ins in Outlook 2016, and Apps in Outlook 2013, and help you speed up the way you access information on the web.
For example, the Bing Maps add-in, (or App) 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, choose the Store button 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.
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.
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.