Remove an Offline Folder from Windows to make it stop synching
Approved Method:
You can gracefully reinitialize offline folders by holding Shift+Ctrl and clicking by mouse on the “Delete files” on Offline files tab in Options of Windows Explorer. It is special trick described in KB Article 230738.
Un-approved Method:
1) disable offline folders
2) delete all the files in c:windowscsc
3) turn offline folders back on