Follow the build steps from Wiki site, we've built imapsync and it also
works to migrate one user's mailbox from old server to new ZCS server.
in order to run imapsync, we need to know users info on host1/host2,
such account/passwd. I'm really curious how system admins do
the mailbox migration job for his users since we have no idea what
users' passwd are in host1?
any advice on this?