1. You wrote:
Q: Does the Groove sync client support # and %.
A: No. Support is limited to the new OneDrive for Business sync client
After a year of confusion I thougt I finally understood that the "OneDrive for Business sync client" is GROOVE.EXE, that terrible unstable and buggy piece of software, and that the "the NEW OneDrive sync client" is onedrive.exe that comes nowhere near Dropbox, but is much better than GROOVE.EXE. Now here comes a Microsoft official and talks about "the NEW OneDrive for Business sync client". The confusion is back again :( Will onedrive.exe support these characters? From which build nr.?
2. Another Microsoft official, Jason Moore, is referring to this article as an answer to the uservoice.com request https://onedrive.uservoice.com/forums/262982-onedrive/suggestions/13697118-enable-long-file-path-for-onedrive-for-business?tracking_code=4a57ae5c469a74aec7315816292716f2. "Boom, it's done". ???? I cannot find anything about long file paths in this article.