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Excel add-ins will not download or install

AJS 55 Reputation points
2026-02-08T17:08:48.3+00:00

Hi -- I am unable to download and install add-ins in my Excel. I have been through two full troubleshooting sessions with Microsoft support where they went through their full list of things to try. They eventually gave up and sent me here. When I attempt to download any add-ins through excel I get an "error loading add-ins" message. When I go directly to the add-in developer's site and attempt to download it directly, I get a "502 Bad Gateway" error. Among other things, I have reinstalled windows 11 a few times now and that hasn't fixed it. Any help appreciated. Thanks.

Microsoft 365 and Office | Excel | For business | Windows

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  1. Ruby-N 10,610 Reputation points Microsoft External Staff Moderator
    2026-02-13T17:44:52.84+00:00

    Dear @AJS,     

    I am really glad to hear that everything is working smoothly again on your side. It is wonderful news that the issue has been resolved and your service is now functioning as expected. 

    I truly appreciate your patience and understanding throughout this process. Thank you as well for taking the time to share the update. 

    If anything else comes up or you need further assistance, just let me know and I will be happy to help. 

    Wishing you a smooth rest of your day. 

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  2. Heather Phillips 0 Reputation points
    2026-02-13T13:20:25.27+00:00

    One of our customers reported this is what worked for him:

    In addition to having to go to Microsoft Store to install it, I had to selected United Kingdom.. After it was installed, I installed a VPN to spoof my location (I selected Japan).

    This confirms that the issue is on Microsofts end and only impacts certain Azure instances, in my case those instances that are provisioned for my location in United States. So to workaround you have to trick Microsoft to provide access to a working Azure instance.

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