Copilot Notebooks chat and file creation

As of today, this issue has resolved for me—files are now saving and accessible as expected. I didn’t change anything on my end, so I’m not sure what fixed it.

At the time I submitting my post, I couldn’t access those files from my M365 environment. 

Another twist...during a recent client Copilot training session with a leadership team, 1 out of 12 executives (from the same company) experienced the same "sandbox" link issue, while the rest could access their Copilot-generated files normally. All 12 were using the same IT configuration, which makes this even more puzzling.

📣 Questions for the community:

• Has anyone else seen this issue resolve on its own?
• If you’ve found a specific fix or explanation, could you share it?
• Could this be a permissions or sync issue that only affects certain accounts?
  
  

Appreciate any insights—especially for those supporting teams where only a few users are affected.