Best Practices

Centralized Deployment of Office Add-ins: A Complete Guide

Roll out Office add-ins to your whole organization from the Microsoft 365 admin center — no manual installs, full control, instant updates.

By Khurram Rasheed

|February 9, 2026|6 min read

Centralized Deployment of Office Add-ins: A Complete Guide

Introduction

Building a great add-in is only half the job — getting it onto every user’s Office reliably is the other half. Centralized Deployment lets a Microsoft 365 admin push an add-in to users and groups so it simply appears, ready to use.

Ways to Distribute an Add-in

AppSource — public listing for anyone to install.
Centralized Deployment — admin pushes to your organization.
SharePoint catalog — older method, still used in some tenants.
Sideloading — for development and testing only.

Why Centralized Deployment?

Centralized Deployment is the recommended path for internal line-of-business add-ins. Admins control exactly who gets the add-in, users never touch an installer, and the add-in works across Windows, Mac, and the web.

Deployed add-ins appear automatically on the ribbon for assigned users — usually within a few hours, and immediately on next Office launch.

Prerequisites

Global admin or Office Apps admin rights in the tenant.
A valid add-in manifest, or an AppSource listing URL.
The add-in’s web content hosted on trusted HTTPS.
Users on Microsoft 365 (Exchange Online for mail add-ins).

Deploying Step by Step

In the Microsoft 365 admin center, go to Settings → Integrated apps.
Choose Upload custom apps, then provide the manifest file or AppSource link.
Review the requested permissions and host applications.
Select the users or groups who should receive the add-in.
Accept and finish to publish the deployment.

Assigning to Users & Groups

You can target everyone, specific security groups, or named individuals. Group-based assignment is best for production — add or remove people from the group and their access follows automatically.

Pilot with a group first

Create a small "Add-in Pilot" security group, deploy to it, validate, then expand to the whole organization. It keeps a bad release from reaching everyone at once.

Updates & Troubleshooting

Because the add-in is a hosted web app, code and content updates ship the instant you redeploy your bundle — no admin action needed. Only manifest changes (new permissions, URLs, or commands) require re-uploading in the admin center.

Propagation takes time

Newly assigned add-ins can take up to 24 hours to appear for all users. Ask testers to fully restart Office before reporting a missing add-in.

Conclusion

Centralized Deployment turns add-in distribution from a support headache into a single admin workflow. Pair it with group-based assignment and a small pilot group, and you can ship updates to thousands of users with confidence and zero desktop installs.

#Deployment#Microsoft 365#Admin#Best Practices#Manifest