What's the load on the existing servers? Without that information; it's pretty difficult to answer your question.
You can easily put 4500 users on a single mailbox server in Exchange 2007/2010. (Of course, you'll want a failover box too.) Regards, Michael B. Smith Consultant and Exchange MVP http://TheEssentialExchange.com -----Original Message----- From: Ellis, John P. [mailto:[email protected]] Sent: Wednesday, March 03, 2010 6:45 AM To: MS-Exchange Admin Issues Subject: Exchange 2007 & 2010 servers Currently on Exchange 2003 we have 4 servers, 3 active 1 passive all on hardware with 4500 users We have 2 servers in the DMZ for webmail and 2 internal servers for webmail, again all hardware based Trying to get my head around whats needed for Exchange 2007 & 2010 Ex2k7 with OCS 2 x Edge servers in DMZ for webmail ? Maybe 2 hub servers? Maybe 2 CAS servers? And say 3 email servers? What about 2010 with OCS/UMS Is there still 2 servers in the DMZ(Edge servers)? Do we still need Hub/CAS servers with 2010? And again 3 email servers with DAS or NAS? Or just lots of discs with a replication to a NAS box? Ive been hunting for a network diagram of an example layouts but not had much luck yet, anyone have any? Thnaks John ------------------------------------------------------------------- John Ellis Tel (0151) 666 3208 Senior IT Officer Fax (0151) 666 3049 Wirral IT Services [email protected] ------------------------------------------------------------------- ********************************************************************** This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. This footnote also confirms that this email message has been swept by MIMEsweeper for the presence of computer viruses. www.clearswift.com **********************************************************************
