The problem with OneDrive taking up a high percentage of CPU has not returned, but instead,
1. At system startup the error dialog still appears each time, "A problem occurred while accessing the Office Document Cache Do you want to repair the problem?". If answered Yes, this opens the Microsoft Upload Center. I have emptied the Office Document Cache using the Upload Center preferences numerous times.
2. If I am using Outlook for Mac, the high CPU usage and loud fan issue returns, but now related to the Outlook for Mac application. Quitting the application resolves the high CPU usage and fast, loud computer fan issue
3. Also OneDrive crashes and goes into a "Failed to respond" state during this time.