quarantine

View Quarantine add-in for Outlook Change Log

Please see How to install an Outlook add-in to view the Microsoft 365 End-User Quarantine for a full description and installation instructions.

Version 1.0.0.0: Microsoft won't certify my add-in because they say it "does not provide significant value or benefits to commercial marketplace customers". I think most of you will disagree. I'll keep trying to get it certified, but in the meantime you can always install it from my website using the procedures from my blog article.

Version 1.0.1.0: Added automatic localization for 37 languages. Reinstall the add-in to if you need one of these languages. Please let me know if my translations need adjustments.

Version 1.1.1.0 : Added new manifest.xml (option 1) and ZIP file (option 2) deployments for GCC (Government Cloud) and GCC High (Government Cloud High) tenants.

This article explains how to install an Outlook add-in called View Quarantine that will open the Microsoft 365 end-user quarantine in a browser with a single click. This makes it really easy to access the quarantine directly from Outlook. And since this is a true Office add-in, it also displays and works in Outlook mobile and Outlook on the web!

I'm happy to announce that the add-in now also works with Microsoft Government Community Clouds (GCC and GCC High)! View the change log for status and feature updates.

The add-in shows in the Outlook ribbon when viewing any folder that contains mail items.

The View Quarantine add-in for Outlook

Simply click the button to open the Microsoft Defender Online end-user quarantine in your default browser. You may need to sign-in to view the quarantine.

The Microsoft 365 end-user quarantine

I originally built this add-in using the Build your first Outlook add-in - Office Add-ins documentation. This gave me a good head start to build and customize the add-in.

The add-in consists of three files plus icons in various sizes for the different platforms.

Source File	Description
commands.html	An HTML "wrapper" that calls the JavaScript used by the add-in when the button is clicked.
commands.js	The JavaScript functions that provide status and open the end-user quarantine in a browser.
manifest.xml	The real heart of the add-in. It defines the unique ID for the add-in and describes when to display the View Quarantine button and how the add-in functions.
assets folder	Contains six icon files of different sizes and opacity for Outlook, OWA, and Outlook mobile.

I'm currently in the process of publishing this add-in to the AppSource marketplace via the Microsoft Partner Center. Please see the change log. In the meantime, there are two ways you can install the View Quarantine add-in now.

Option 1 -- Install via the Web

You can install the add-in from my website until Microsoft publishes it on AppSource.

Open Outlook and click the Get-Add-ins button in the ribbon. Alternatively, click File and click the Manage Add-Ins button at the bottom.
Click My add-ins in the top left.
Click the + Add a custom add-in dropdown at the bottom of the window under Custom add-ins, then select Add from URL...
Enter the following URL: https://www.expta.com/quarantine/manifest.xml and click OK.

If your mailbox is in a GCC tenant use the following URL: https://www.expta.com/quarantine-gcc/manifest.xml
If your mailbox is in a GCC High tenant use the following URL: https://www.expta.com/quarantine-gcch/manifest.xml

You will see a warning before installation. Click Install to install the add-in.

The add-in will now be listed under Custom add-ins. Note: To remove the View Quarantine add-in at any time, click the ellipses (...) and select Remove.

Close the Add-ins window to add it to the Outlook ribbon.

Option 2 -- Install from Source Files

You can also install the add-in using the manifest.xml file in my source files.

Download the correct source files from my website:

View Quarantine for most world-wide tenants
View GCC Quarantine if your tenant is GCC
View GCC-High Quarantine if your tenant is GCC High

Extract the ZIP file to a local drive or network share.

Open Outlook and click the Get-Add-ins button in the ribbon (shown above).
Click My add-ins in the top left.
Click the + Add a custom add-in dropdown at the bottom of the window under Custom add-ins, then select Add from file...
Browse to the manifest.xml file and click Open.
You will see a warning before installation. Click Install to install the add-in.

The add-in will now be listed under Custom add-ins.

Close the Add-ins window to add it to the Outlook ribbon.

Deploying to All Users in the Organization

Once you're satisfied that the add-in is installed and working properly, you can deploy it to all users in your organization. Here's how to do that:

Open the Microsoft Admin Center and navigate to Settings > Integrated Apps > Add-Ins.
Click Deploy Add-In and Next.
Click the Upload Custom Apps button.
Select I have a URL for the manifest file and enter one of the following URLs:

For standard M365 use https://www.expta.com/quarantine/manifest.xml
For GCC use https://www.expta.com/quarantine-gcc/manifest.xml
For GCC High use https://www.expta.com/quarantine-gcch/manifest.xml

Select whether to install the add-in for everyone or specific users.
Select a Deployment Method.

Fixed (Default). The add-in will be automatically deployed to the assigned users and they will not be able to remove it from their ribbon.
Available. Users may install this add-in by clicking the Get More add-ins button on the home ribbon in Outlook and going to Admin-managed.
Optional. The add-in will be automatically deployed to the assigned users but they can choose to remove it from their ribbon.