I have a user experiencing several issues on a Win7 machine using Office 365 (local application).
Background: She's created about 25 GB worth of OneNote folders and has been storing them on a company Sharepoint so others can edit them. Every individual project is created as a separate Notebook. They mostly just consist of project notes and any emails associated with the project are exported into the Notebook.
Problem: A few weeks ago, she started having issues with OneNote saying that the cache needs to be deleted in order for OneNote to start. Clearing the cache helped for a little while, but then after opening Notebooks again, more issues started coming up. When she goes to search using the search bar on the top right, if the result she clicks on is in another Notebook, nothing will happen. If she minimizes the window, then brings it back up, then OneNote will finally switch Notebooks. OneNote has also been freezing (not responding) a lot recently. About 2-4 times a day. When she exits OneNote and tries to bring it back up, about 20% of her Notebooks are saying that they cannot sync changes and giving her the yellow triangle.
What I've tried: I tried clearing the cache which helped a little. I assumed OneNote was freezing and having issues because she had 200+ Notebooks open at a time and it was just too much. Within minutes she started having issues though. I tried adjusting the backup schedule and reduced the number of backups to keep to 1 copy. I then tried to delete the OneNote settings and optimize all the files. Finally, I tried to use the built in Office repair tool which seemed to help for about 3-4 hours before the same issues started coming up.
Any ideas?