Characters that can't or shouldn't be used in File, folder and site names.
~ # % & * { } \ : < > ? / + | " . _
Notes:
- Period can't be used consecutively in the middle of a name or at the end
- Underscore shouldn't be used at the start of any name
- Spaces are encoded as %20 (3 sharacters) and count to the 240 character Web-DAV file length limit