"There are two things that strike me as odd about the
Microsoft approach to this problem as compared to Linux or any
other Unix. First, why does one have to purchase Microsoft Exchange
to get this feature? I can accomplish the same task several
different ways in Unix with free software that isn't even remotely
related to a message store or even a database.
The obvious answer is that Microsoft is using the Offline
Folders features as one of Microsoft's many crowbars that are
designed to crack open its customers doors (not to mention their
wallets) and shove Exchange into their enterprise.
There is no such agenda in Linux, so there is no need to
complicate the process of synchronizing documents by wedging the
folder replication feature into a message store. There are several
ways you can accomplish the same goal in Linux, but the one that
seems closest to duplicating the function of Microsoft's Offline
Folders is rsync, which is the utility Kevin mentioned in his