Unauthorized error when backing up to OneDrive for Business Since that is API limitation on MS side we currently can suggest modifying certain configuration parameters manually, that can help.
1)
- close the Backup application
- open settings folder: C:\ProgramData\CloudBerryLab\CloudBerry Backup\
- find file enginesettings.list
- edit this file with notepad
- Find the string "10000000"
- change 10000000 to 2000000
- close and save the file
- restart the Backup application
2) Reduce number of threads (Tools/Options/Advanced) to 1.