Excel add-ins will not download or install

AJS 55

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.

donutvector 25 Reputation points

2026-02-09T16:54:07.76+00:00

Have this exact same problem. Went through all the troubleshooting listed in response to this question. This is almost certainly an issue on the server side with Microsoft.
Ruby-N 10,610 Reputation points Microsoft External Staff Moderator

2026-02-09T22:28:10.65+00:00

Dear All,

Thank you all for sharing your experiences here. I understand how challenging this issue is, especially since it appears to be affecting multiple users and persists even after extensive troubleshooting.

I want to share what I have checked so far. I reviewed the Service Health section in the Microsoft 365 admin center for work or school tenants. At this time, I don't see any reported issues related to Excel add-ins failing to download or install. This doesn't mean the issue is not real, only that it may not yet be widely reported.

If you are using a work or school account:

I sincerely recommend reaching out to your IT administrator to create a support ticket via Microsoft 365 Admin Center > Support > Help & Support for further investigation.

A technical support engineer can perform a remote session to investigate the situation, verify the backend configurations, and run any necessary synchronization tools to resolve the problem. If the issue requires further attention, they can escalate it to a specialized team for deeper analysis.

If you are using a Home or Personal Microsoft account:

The best next step is to submit feedback through the Microsoft Feedback Portal. Adding your scenario, along with upvoting and commenting on similar reports, helps increase visibility and makes it more likely that the product team will notice and investigate the pattern.

Once you've submitted your feedback, feel free to share the link here in the comments. I’ll be happy to upvote it to help bring more visibility. If you prefer, I can also submit this issue on your behalf. Just let me know, and I’ll post it for you and share the link once it’s published. I’m here to help ensure your feedback gets the attention it deserves.

As forum moderators, I have limited visibility into detailed logs and backend systems due to privacy and security boundaries. I also do not have the ability to escalate issues internally. My role here is to help by sharing known information, providing relevant troubleshooting guidance and directing users to the appropriate support channels where deeper investigation can be performed.

I appreciate everyone taking the time to document their symptoms and troubleshooting steps. I will keep monitoring Service Health and stay alert for any updates or announcements to assist as much as I can.
AJS 55 Reputation points

2026-02-09T22:48:22.2666667+00:00

I'd appreciate it if you could submit the issue on my behalf. Thank you!
Heather Phillips 0 Reputation points

2026-02-13T13:19:39.4333333+00:00

Our customers are having this same issue installing our add-in (Tiller Money Feeds) one of our customers reported the following worked for him to get it installed:

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.
AJS 55 Reputation points

2026-02-13T17:20:48.13+00:00

Good news. It seems that it was a problem on Microsoft's end and they have now fixed it. Everything all of a sudden started working perfectly. Thanks, all.

7 answers

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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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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Excel add-ins will not download or install

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