Greetings! I am a freelancer that also runs a security company. We are a Barracuda partner and we specialize in small to medium businesses in the Los Angeles area (but we can work anywhere, thanks to remote desktop services!).
On one of my more recent assignments I was the global information security consultant responsible for Mattel's integration of Mega Bloks IT infrastructure into Mattel's and a component of this was to put in place an archiver tool like this so Mega's old email system data could be retained in an efficient manner.
I know that I have the experiences and the capabilities to more than adequately solve your technical challenges which are only described by a basic installation. You will need an email archival program that routinely takes your archived email offline and is ingested by this tool and it's software.
Hopefully we have a chance to speak some time soon so we can get a proposal in place and make your Barracuda Archiver part of your production environment with our assistance.
Steve Weltman, CISSP
Absolute Network Solutions, Inc.