San Diego’s got 2020 vision. Get your pass to the Clio Cloud Conference, October 15-16, 2020, 
Objective:
n/a
Environment:
- Clio Manage
- Clio Grow
Additional Information:
Clio does offer an integration with Google docs, which could also be used to take notes (which would be visible in Clio).
Answer:
No, Clio does not currently integrate with OneNote.