Firewall configuration to allow Exchange OnPremise Addin download

Geoffrey Blaser 21 Reputation points


We have recently blocked the traffic to increase security on our DAG Exchange On Premise infrastructure and we are now unable to download Office Add-ins from the Microsoft store.

Do you know which URLs/ports must be allowed on firewalls to make it works again ?

Thanks for your help !



Exchange Server Management
Exchange Server Management
Exchange Server: A family of Microsoft client/server messaging and collaboration software.Management: The act or process of organizing, handling, directing or controlling something.
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  1. Joyce Shen - MSFT 16,331 Reputation points Microsoft Employee

    Hi @Geoffrey Blaser

    We could refer to the official document which lists all the ports Exchange server needs
    Network ports for clients and mail flow in Exchange

    And Office Web Add-ins require a secure HTTP connection (i.e. HTTPS). Normally this would be handled over 443 but that is just the standard port. Which port you host it on however is entirely up to you.
    Here is a related thread discussed the similar question: Can Office Add-Ins function if port 80 and 443 are blocked?
    Please Note: Since the web site is not hosted by Microsoft, the link may change without notice. Microsoft does not guarantee the accuracy of this information.

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  1. Geoffrey Blaser 21 Reputation points

    Hi @Joyce Shen - MSFT ,

    Thanks for your reply, it's not exactly what I've expected as we have added few security filtering based on URLs but if Microsoft doesn't guarantee that links used then I guess we have no choice to allow URLs by apps...

    Geoffrey Blaser

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