@BackupTester If your backup set contains files/folders that have insufficient access rights, IDrive will not backup those files/folders. Hence in such a case, by default, your backup will be considered as 'Failure'.
To ignore file/folder level access rights/permission errors, Go to the 'Settings' tab.
Select 'Ignore file / folder level access rights / permission errors' option. This will ignore any access rights/permission errors on any file or folder that are part of your backup set.