Yep absolutely up with creating different user names, it appears that the NAS or Windows is hell bent on having a user account name the same as the account on the NAS (even though they have different passwords) (Have tried /freenas/account etc as well) I can access the share using the backup account via Veeam just not from a Windows Explorer session. (Ive added my account to the backup group (which matches the computer username) and I can access the backup share. Ideally I want only the Backup account to access the share for security reasons.