It appears that last week Microsoft added a new and largely unheralded capability to the Office 365 checker tool.
A change to Microsoft’s main troubleshooting article for OneDrive for Business, KB 3125202, added a reference to an option in the Microsoft Support and Recovery Assistant for Office 365 tool that can be used to scan for files that are too big, file and folder names that have invalid characters, for path names that exceed the length limit, and several other headache-inducing problems. This appears to be a new capability for the Office 365 checker tool.
