Hi @tamy.santos,
I found the solution !
4C2827D5DBACC3BA!s47b226b86c39473fb91dc3f00d11ef47
This is the Microsoft Graph DriveItem ID.
It identifies the file in OneDrive/SharePoint and is required for Graph endpoints like:
/me/drive/items/{id}/workbook
It’s stable and fully recognized by the Excel API.
47b226b8-6c39-473f-b91d-c3f00d11ef47
This is an internal SharePoint UUID.
Used for storage, URLs, eTags, hashes — not recognized by Graph for /workbook, which causes invalidResourceId / ObjectHandle is Invalid.
Once I switched to the DriveItem ID, everything worked.
Thanks,