Installation For Organization
We recommend that you manage the add-in for your Exchange Online organization via Centralized Deployment in the Office 365 admin center. For more information, see Manage deployment of Office 365 add-ins in the Office 365 admin center.
Before you begin, see Determine if Centralized Deployment of add-ins works for your Office 365 organization.
Download the manifest file here.
Sign in to Office 365 for business with your work account.
Select the app launcher icon in the upper-left, and choose Admin.
TIP: Admin appears only to Office 365 admins.In the navigation menu, choose Settings > Services & add-ins.
If you see a message on the top of the page announcing the new Office 365 admin center, click the message to go to the Admin Center Preview (see About the Office 365 admin center).
Choose Deploy Add-in at the top of the page.
Choose from one of the following options on the Centralized Deployment page:
I have the manifest file (.xml) on this device: For this option, select Browse to locate the manifest file (.xml) that you want to use.
I have a URL for the manifest file: For this option, type the URL in the field provided.
Download the manifest file here.
7. Select Next.
8. Specify who has access, select either Everyone or Specific users/groups. Use the Search box to find the users or groups which you want to deploy the add-in to.
9. Select Deploy now and please wait.
10. When finished, choose Save, review the add-in settings, and then select Close.
11. You now see the add-in along with other apps in Office 365.