One of my customers currently uses Google Apps as their primary Email system. Pretty much entirely using the web (gmail) interface. They are happy with this solution. It is cost effective, fast and familiar as they also use personal Gmail accounts.
What concerns me (as their System / Network Admin) is that there is no backup other than what Google is doing behind the scenes. What happens in a scenario that their accounts are inaccessible for an extended period of time or perhaps worse if they arrive to empty mailboxes one morning.
How can I ensure that this customer has a viable exit strategy and can walk away with a backup of all their email.
Preferably with no down time when switching to either another cloud provider or perhaps an internal Exchange solution.
I am curious what the EE community thinks of this problem and how they would overcome it?