Angus Not clear from your message if you intend to still run as a cluster?, if you are then you will need the Enterprise version of Exchange If you are not, then you can use the Standard version, the only drawback would be the limit on the number of mailbox stores (1 per server), by having more mailbox store on a server you can spread users among different stores thus reducing the downtime users may experience in the event of a store failure. Mark Fugatt Dedicated Supportability Engineer (Exchange) Microsoft Limited Desk: +44 (0)118 909 5630 Mobile: +44 (0)7966 858108 MSN IM: markfu@xxxxxxxxxxxxxxxxx Blog: http://blogs.technet.com/mfugatt Dedicated to proactively supporting Microsoft's enterprise Customers -----Original Message----- From: Angus Macdonald [mailto:Angus.Macdonald@xxxxxxxxxxxxxxxxxxx] Sent: 11 January 2006 15:56 To: [ExchangeList] Subject: [exchangelist] Exchange 2003 server editions http://www.MSExchange.org/ I am looking at replacing an old clustered Exchange 5.5 server (active/passive) with a pair of Exchange 2003 servers with the mailbox and other resources split between them. To have more than one server in a single organistaional unit, do I need the standard or Enterprise edition of 2003? The comparison on the MS website doesn't make it clear (to me at least - I'm not a mail specialist). Thanks Angus ------------------------------------------------------ List Archives: http://www.webelists.com/cgi/lyris.pl?enter=exchangelist Exchange Newsletters: http://www.msexchange.org/pages/newsletter.asp ------------------------------------------------------ Visit TechGenix.com for more information about our other sites: http://www.techgenix.com ------------------------------------------------------ You are currently subscribed to this MSExchange.org Discussion List as: markfu@xxxxxxxxxxxxx To unsubscribe visit http://www.webelists.com/cgi/lyris.pl?enter=exchangelist Report abuse to info@xxxxxxxxxxxxxx org