A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
Hello FRED TROST,
Thank you for reaching out to Microsoft Q&A forum
I understand your Excel is showing the message "Sorry, our server is temporarily having problems. We're working on it"
This is not caused by your file, device, or license in most cases. It typically happens when Excel is trying to reach Microsoft services (sign-in, licensing, co‑authoring, templates, add-ins, or AutoSave) but unable to reach Microsoft server.
What you can do right now is to wait for when the service is back to working again. Also make sure your internet connection is still working too.
You can check the Microsoft service status here for when the Microsoft service is back online:
https://status.cloud.microsoft/m365/referrer=serviceStatusRedirect
Feel free reply back to this post If you need further assistance, I'll be happy to help.