I’m sharing this because I’m honestly frustrated with what happened after upgrading to Copilot for Microsoft 365. Everything was working fine with the regular Copilot, but the moment I switched to the premium version, the tool completely broke for me.
Right after upgrading, Copilot stopped reading the contents of any uploaded file. Every file — TXT, CSV, ZIP, XLSX — would upload, show the filename, and then Copilot would say the file was empty or unreadable. I tested everything on my side: different browsers, tiny files with just one line, Copilot on office.com, Copilot on desktop, reinstalling Office, clearing cache, everything. The files opened perfectly on my computer, but Copilot acted like they were blank.
Support even acknowledged that the issue wasn’t my device or browser. They said it was a problem with the Copilot service itself. But instead of escalating it to engineering for a backend reset, I was redirected to the Feedback Hub and then transferred to billing. No real fix, no escalation, no solution.
At that point, I decided I wasn’t going to wait out the billing period. I canceled my subscription immediately. I’m not paying for a premium upgrade that broke the moment I activated it, especially when the issue clearly isn’t on my side.
If anyone else upgraded to Copilot M365 and suddenly started getting “file appears empty” errors across all platforms, it’s not you. It’s not your files. It’s not your browser. It’s a backend ingestion failure tied to your account, and unless support escalates it, it won’t fix itself.
Just sharing this so others know they’re not alone if they run into the same thing.
