I've heard reports that at least some versions of MS Exchange, in conjunction with some versions of the W2K, offer the ability to do realtime or near-realtime mirroring of Exchange data and configuration to a backup Exchange server from a live one, and to provide transparent failover to the backup server in the event of a critical problem with the live server. Is anyone on the list familiar with this capability, and on which combinations of Exchange and Windows OS it is supported? I can find little mention of mirroring of any kind in conjunction with the Exchange area on the Microsoft website. Yours, Kurt Reimer gkr@xxxxxxxxxxxx Voicenet Systems Administration