Hi Steve,
Apologies for the delay in responding, I didn't get a notification that an update had been posted. Whilst it is an interesting suggestion, updates in this thread state that only the account that created the import.cfg can access the data contained within sync tool. Also, when you say my account, do you mean my standard windows account or my admin account? As I have not, and would never, log on to a server with my standard account.
What I would say is that I do not believe that this is an authentication issue, the credential work fine. As I have stated more than once, if I run the command manually from a command prompt, it works without issue, and that is running in the same user context as the Task.
Thanks
Osman