Install the Microsoft Excel add-in

You must be a Microsoft 365 admin to complete this procedure.
  1. Go to the Microsoft 365 admin center.

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  2. Click Settings on the left-hand panel and then click Integrated apps.

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  3. On the Integrated apps page, click Upload custom apps.

  4. Type the following path in the Provide link to manifest file field and click Validate:

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  5. On the Add users page, select the Entire organization checkbox and then click Next.

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  6. On the Accept permissions requests page, click Accept permissions and then click Next.

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  7. On the Permissions requested Review for your organization page, click Accept.

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  8. On the Review and finish deployment page, click Finish deployment.

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  9. On the Deployment completed page, click Done.

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