Microsoft 365 Installation Problems

How to Deploy a React Word Add-In to Start Automatically

Natalie Taylor Sep 28, 2026 871 views

Question details

The user needs a React-based Word add-in to start automatically for end-users in a production environment without requiring manual activation.

How to Deploy a React Word Add-In to Start Automatically

Product: Microsoft Word
Device & OS: not provided
Scenario: Deploying a custom React-based add-in to a production environment where it needs to initialize automatically for users.
Observed behavior: The add-in successfully runs and starts automatically in debug mode via manifest and registry changes, but requires users to manually activate it in production environments.

Before you start

Ensure your React add-in is fully packaged, signed with a trusted certificate, and that you have administrator access to your target deployment environment (such as the Microsoft 365 Admin Center).

Solution 1Recommended

Use Microsoft 365 Centralized Deployment

The most secure and Microsoft-supported method for organizations using Microsoft 365 to deploy add-ins automatically to users.

Office add-ins do not generally support unrestricted automatic activation through local registry edits alone due to security restrictions. Centralized deployment manages these permissions at the organizational level.

Package and Sign

Ensure your React Word add-in is appropriately packaged and signed for production release, and hosted on a secure HTTPS server.

Access Admin Center

Upload Manifest

Navigate to Settings > Integrated apps and choose to upload your custom manifest file for the add-in.

Assign Users

Assign the add-in to specific users, groups, or the entire organization. Once propagated, the add-in will automatically deploy and activate for the targeted users.

Use Microsoft 365 Centralized Deployment

Deployment Propagation: Centralized deployment can take up to 24 hours to fully propagate to all users' Office applications across the organization.

Solution 2

Deploy via Trusted Network Share or MSI

The recommended approach when cloud-based deployment is not allowed by organizational security policies.

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Frequently Asked Questions

Can I use only registry edits to make an Office add-in start automatically?

No. Office add-ins generally do not support unrestricted automatic activation strictly through registry edits due to built-in security constraints. A supported deployment method like Centralized Deployment is required.

Why does my React add-in start automatically in debug mode but not in production?

Debug mode bypasses several security and deployment policies for developer convenience. In a production environment, add-ins require proper packaging, signing, and organizational deployment policies to trigger automatic activation.

What is required to use Microsoft 365 Centralized Deployment?

You need an active Microsoft 365 subscription, administrator privileges in the Microsoft 365 Admin Center, and your add-in must be properly manifested and hosted on a secure (HTTPS) web server.

How do I deploy my add-in if my organization blocks cloud deployments?

You can use an on-premises deployment method, such as a trusted network share deployed via Group Policy, or package your add-in using an MSI installer that configures the necessary trusted locations on local machines.

Installation & Activation