System Hostname changed, backup file names didn't My OCD was too strong and I couldn't just let MSP360 continue to use the old hostname. I found the problem setting(s) in C:\Users\All Users\CloudBerryLab\CloudBerry Backup\enginesettings.list There is a tag <BackupPath> that contains the hostname (actually one for each plan). The GUI doesn't seem to expose this setting. In hindsight, I might have been able to create a new plan and it might have take the new hostname. Cloning the old plan didn't use the new hostname. But with the number and complexity of my plans, that would have been a lot of work.