MerciApp integrates directly into your Outlook software on Windows, macOS, and Outlook Online.

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You can check the specifications required to use it in this article.

Installation

• Go to Microsoft AppSource and search for "MerciApp" in the search bar.

• Select "MerciApp" and click "Get it now."

• Sign in or create a Microsoft account.

• Enter your profile information if you haven't already done so.

• Check the access authorization box.

• Click "Continue."

• MerciApp will now appear every time you compose an email, in the banner at the top of your screen.

Alternative solutions

• From Outlook, click on the "Add-ins" button and search for "MerciApp" in the list of extensions.

• Go to the "My Add-ins" section in the left side menu and scroll down to the "Add an add-in" section.

Adding from a URL

• Click on "Add from URL" and enter the following value: https://office-outlook.merci-app.com/manifest.xml.

Adding from a file

• Go to this address in your browser; right-click and save the file to a location that is easy to identify.

• Click on "Add from file" and select the file you downloaded earlier.

Bulk deployment

Office 365/Microsoft 365 administrators can perform a bulk deployment of the MerciApp add-in so that it is available to every employee without any action on their part. To do this, please refer to the official instructions provided by Microsoft.

Frequently asked questions

What should I do if I don't see the "Add-ins" button in Outlook, or if this button is disabled?

• Check that the add-in is compatible with your version of Outlook according to the system requirements.
• Within an organization such as a company or association, your administrator may have restricted the addition of add-ins; contact them to find out and, if necessary, ask them to authorize the addition of the MerciApp add-in on your computer.
• You use Outlook but do not have a Microsoft account. Go to the add-in page MerciApp on AppSource and click on "Get it now"; if you do not have an account, you will be asked to create one.
• If none of these solutions allow you to install the add-in, please contact us via chat and we will do our best to help you.

Is MerciApp for Outlook supported on mobile devices (iOS and Android)?

Not at this time, but please contact us via chat for more information if the situation changes.

Updated on: 11/02/2026