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Note

This process must be completed by one of the organization’s Microsoft 365 administrators with the proper permissions.

Step 1: Deploy add-in using the 365 Admin Center

  1. Navigate to the Microsoft 365 admin center: https://admin.microsoft.com/AdminPortal.

  2. On the left navigation bar near the bottom, expand Settings and click Integrated Apps.

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  3. In the header, click Add-Ins.

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  4. In the tab that appears, click Deploy Add-in.

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  5. Click Next and then click Upload custom apps.

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  6. Select I have the manifest file (.xml) on this device and click Choose File. Find the manifest file. Select the file and click Upload.

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  7. In the next screen, decide who to deploy this button to in the first section. In the next section, select Fixed (Default). After you’re satisfied with the selections, click Deploy.

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  8. The deployment can take up to a few minutes. After it is complete, you see a success message.

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  9. After completion, you see the Expel for Phishing add-in in the list of installed add-ins. Microsoft notes that it can take up to 12 hours for the add-in to propagate to all users but if you reached this point, the installation is complete.

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