How do I overwrite old backups for Acronis TI Echo Enterprise Server (build 8,206)

Hi,

I'm desperatly trying to figure out where I can set the marker to overwrite older archives. I've looked through what seems to be the correct documentation and search the web and these forums, but I can't find anything. I know this is an older version but this is what my client has. It wasn't an issue when he used tapes but he's now switched to an NAS device, which works fine except it's now full.

Any advice would be great.

Thanks,

Geoff