[Obm] Backup /replication server

[Benito Chamberlain]

Dear OBM community.

One of our clients are running OBM with about 120 mail users.

Can anyone recommend a way of replicating an OBM server to a backup 
server / machine so that
it can can act as a fail over solution in case of a disaster?

I know where most of the data resides, so it's easy to sync , but 
there's not enough time
to reinstall and add all of these users should the current server crash 
or fail.

All input would be appreciated.

Kind Regards
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