Install Image Gallery in Microsoft Teams

Last updated: May 31, 2026

Image Gallery is provided as a Microsoft Teams app package that can be uploaded to your organization’s Microsoft 365 tenant as a custom app. This guide walks Teams or Microsoft 365 administrators through uploading the package in Teams admin center and granting admin consent.

Try without a license

Organizations that have not purchased a license yet can still install the app and try it free for 30 days with up to 10 users. The trial automatically starts when the first user signs in.

Need your IT team to install Image Gallery?

If you are an end user and want your IT department to install Image Gallery for you, click here for more details.

Before You Begin

You need a Teams or Microsoft 365 admin account that can upload custom apps and grant admin consent for your organization.

Download the app package first. The package file is the zip file you will need to upload in Teams admin center.

Download Teams app package

Item	Value
Package file	`appPackage.prod.zip`
Version	`1.1.9`
Size	`32,923 bytes`
Download URL	`https://web.imagegallery.dialtoneapps.com/downloads/appPackage.prod.zip`

Get Help

Step-by-Step Setup

Microsoft guidance

Microsoft Learn explains the tenant settings behind custom app upload in custom app policies and settings.

1. Start a New App Upload

In Teams admin center, go to Teams apps > Manage apps. Open Actions, then select Upload new app.

Teams admin center Manage apps page with Actions menu showing Upload new app

2. Choose Custom App Upload

In the upload dialog, select Upload.

Teams admin center upload custom app dialog

3. Select the App Package

Choose the downloaded appPackage.prod.zip file and select Open.

Windows file picker selecting the Image Gallery app package zip file

4. Open the Added App

After Teams admin center confirms that the new app was added, select this link in the dialog to manage Image Gallery.

Teams admin center dialog confirming new app added with a link to manage it

5. Review the App Page

Confirm that the app is Image Gallery by Dialtone Apps, then open the Permissions tab.

Image Gallery app details page in Teams admin center

On the Permissions tab, review the required delegated permissions and select Grant admin consent.

Verify before consent

Before granting consent, you may want to use the app identity verification details to verify the integrity of the consent link, the app (client) ID and the publisher tenant ID.

Teams admin center permissions tab with Grant admin consent action

7. Choose an Admin Account

The consent window opens in a new tab. Choose the admin account you want to use for consent.

Microsoft sign-in window asking the admin to pick an account

8. Accept the Requested Permissions

Review the permissions requested by Image Gallery. The consent dialog will show the publisher as unverified. That refers to the Microsoft publisher verification badge status, which Image Gallery currently doesn’t have. Use the proof of authenticity that the app identity verification details page provides to verify the app’s identity and then click Accept.

Microsoft consent dialog for Image Gallery showing requested permissions and Accept button

Return to Teams admin center. The permissions tab should show that admin consent was granted for all required permissions.

Teams admin center permissions tab showing admin consent granted

After Setup

After upload and consent, confirm who should have access to Image Gallery in Teams. Teams administrators can manage app availability, app setup, and who can add or use the app through Teams admin center controls.

See the features page to explore and learn about what features Image Gallery has to offer.