As an admin, you can deploy Office add-ins to the users in your organization by using the Centralized Deployment feature in the Microsoft 365 admin center. Centralized Deployment is the recommended and most feature-rich way for most admins to deploy add-ins to users and groups within an organization.

  1. In the admin center, go to the Settings > Integrated apps > Add-ins page (If you don't see the Settings > Integrated apps page, go to the Settings > Add-ins page)

2. Click Deploy Add-in at the top of the page, and then click Next.

3. Click Upload custom apps

4. Download manifest.xml from and choose this file in the next step, select Upload.

5. On the next page, select Everyone, Specific users/groups, or Just me to specify who the add-in is deployed to. Use the Search box to find specific users or groups. If you've deployed to just yourself, you can select Change who has access to add-in to deploy to more users later. Please, note that only users with installed Add-in will have signatures applied to emails after they are deployed.

A green tick appears when the add-in is deployed.

Please Note! Outlook add-ins can take up to 24 hours to be processed by Microsoft 365 and users might need to relaunch the Outlook app.

The minimum required version:

  • For Outlook on Mac is 16.54 (21101001), New Outlook mode.

  • For Outlook on Windows is 16.0.14511.10000.

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