Dear JamesHenry (jhenry),
Good day! Thank you for posting to Microsoft Community. We are happy to help you.
We are sorry to hear that your user having trouble with Excel on his iPad. I deeply understand the inconvenience caused and apologize for it.
We appreciate your understanding that sometimes the initial response may not resolve the problem immediately. However, we can work together to narrow down and resolve the situation. So, for further troubleshooting, could you please provide the information below:
- Could you please let me know if both the Excel and SharePoint apps (If the user has it) are updated to the latest versions on the iPad?
- May I know if the user has tried resetting the sign-in credentials?
- Go to Settings on your iPad.
- Scroll down and select Excel.
- Under RESET, tap Reset Excel and enable Delete Login Credentials.
- Repeat the same steps for the SharePoint app.
- Could you please let me know if the user has tried uninstalling and reinstalling both the Excel and SharePoint apps (If the user has it)?
- Could you please let me know if the user has tried restoring the Excel file to a previous version? and check if they can recover the data?
- Open the Excel app on the iPad and navigate to the file you want to restore.
- Tap on the file name at the top of the screen.
- Select "Version History" from the dropdown menu.
- Choose the version you want to restore from the list of available versions.
- Tap "Restore" to revert to the selected version.
Since you mentioned the data is stored in SharePoint you could also try the steps in the following article: Restore a previous version of an item or file in SharePoint - Microsoft Support. If you are still unable to recover lost data, then this requires more resources and expertise than our forum team currently possesses. Therefore, I sincerely recommend that you create a support ticket with Microsoft Support directly as soon as possible by following the steps in this link: Get support - Microsoft 365 admin | Microsoft Learn
Once again, I apologize for the inconvenience this has caused. We appreciate your patience and understanding and thank you for your time and cooperation.
Sincerely,
Ralph Chawatama | Microsoft Community Moderator