How to prevent add-in downloads by turning off the Office Store across WEB outlook

Ammar 1 Reputation point

Hi all - I was able to turn off the Office Store across all Office apps (desktop), including Outlook client. The article below explains the steps:

However, I cannot find instructions on how to turn off Office Store across Outlook Web. While I can't access Office Store via the client, I am able to download and install add-ins via Outlook Web and I'd like to lock it down for my users.

Office Development
Office Development
Office: A suite of Microsoft productivity software that supports common business tasks, including word processing, email, presentations, and data management and analysis.Development: The process of researching, productizing, and refining new or existing technologies.
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Outlook Management
Outlook Management
Outlook: A family of Microsoft email and calendar products.Management: The act or process of organizing, handling, directing or controlling something.
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  1. Faery Fu-MSFT 16,411 Reputation points Microsoft Vendor

    Hi @Ammar ,
    Welcome to our forum!
    According o my search, you can change the default role assignment policy to achieve your requirement. see the steps below:

    1.Log in to EAC (exchange admin center) with an admin account.

    2.Click permissions > user roles > double-click the default role assignment policy > uncheck My Custom Apps、My MarketPlace Apps and My ReadWriteMailbox Apps option as the picture below:
    173249-eac.png save. then the end users shouldn’t have the ability to turn on additional add-ins as long as they haven't been assigned other role policies.

    Please feel free to let us know if there is any update on this thread.

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  2. Ammar 1 Reputation point

    Thank you, @Faery Fu-MSFT !

    1. Will this change impact existing Add-ins deployed like Zoom add-ins, etc. that are currently in use?
    2. how can I enable new add-ins in the future as needed by the business? i.e. enable 1 or 2 add-ins vs all add-ins

    I only have one policy like shown in the screenshot above, Default Role Assignment Policy.

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  3. Faery Fu-MSFT 16,411 Reputation points Microsoft Vendor

    Hi @Ammar ,

    I only have one policy like shown in the screenshot above, Default Role Assignment Policy.

    Could you please provide a detailed screenshot? Have you try to double-click the Default Role Assignment Policy?
    According to my test, when I unchck the three options, and the add-in in office-store is limited to install, and the original add-ins work nomal.

    If you need further help, please provide more detailed information, so that we can give more appropriate suggestions.