We experience inconsistent naming for the Notebooks related to an office 365 group. So far we have three different cases. None of these names were changed manually. When opening such a notebook in the OneNote desktop version the name of the notebook can be:
- "Notebook" which is the worse, because you have to go through each of them before you can identify the correct one.
- "Notebook" + group-id (which is also used in the url of the team site)
- "Notebook" + group name
I suspect it is related to the way the group was created but I hope this will become consistent in the near future!