Outlook 11: butt-saver or security risk?

I had a network account, from a certain large software company, used for my work for them. Due to an administrative snafu, it was disabled and won’t be re-enabled until the manager returns after the holidays. I needed a message that had been sent to that account? What to do?
In my case, it was simple: I fired up Outlook 11 and got the message out of my client-side cache. This really isn’t a new feature; Outlook’s had PST and OST files for a long while. However, Outlook 11’s synchronization is seamless and automatic. As an end user, that’s great. As an administrator, though, it makes me wonder: what can I do to prevent or restrict the use of cached content? I have a sneaking suspicion that Microsoft has some ideas in this direction, and that we’ll be seeing them emerge in future betas of Outlook 11.