Having a web Sharepoint folder sync to your Windows 10 file explorer isn't intuitive. Here is a four minute video showing the process:
https://uw.hosted.panopto.com/Panopto/Pages/Viewer.aspx?id=b17a4d45-3cc9-4583-8ade-ad510105bfe6
1) log into Onedrive with your UW netid and password (work or school button)
2) be in your web based Sharepoint location you want to connect to
3) Click "Sync". You may need to accept by pressing "Open" on the dialog that it is opening the Onedrive sync tool.
4) You'll find the newly mapped share in the sidebar inside the icon marked "UW"
Note: Avoid "Add shortcut to OneDrive" button in the webview. This seems to have undesired effects for most users. This button shows the added folder in your personal onedrive as a shortcut: