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Chris, Only one node is "active" ever. There's a private network (each node is dual-homed) with a "heartbeat" signal where the two nodes keep track of each other. If the active node's heartbeat disappears, then the passive node takes over the cluster and becomes the active node. The mail store resides on a shared SCSI stripe array that both nodes connect to. The two nodes together make up a single "virtual server", so no, this isn't a frontend/backend config. All clients including OWA hit on the virtual server. Thomas P. Carter, Ph.D. Department of Chemistry Michigan State University East Lansing, MI 48824-1322 -----Original Message----- From: Harper, Chris [mailto:[log in to unmask]] Sent: Thursday, November 10, 2005 5:25 PM To: Thomas P. Carter Subject: RE: [MSUNAG] Exchange Server SP2 Tom, On an off topic note, I'm interested to hear the inner workings of your exchange cluster -- at what point does it failover, is this the front-end/back-end setup or is this different? When a user hits OWA, which server are they hitting? Best regards, Chris Harper INFORMATION TECHNOLOGY SPECIALIST University Relations / Michigan State University Email: [log in to unmask] / Office: 517.355.6611 x 103 Web: http://ur.msu.edu / Cell: 616.291.1987 -----Original Message----- From: MSU Network Administrators Group [mailto:[log in to unmask]] On Behalf Of Thomas P. Carter Sent: Thursday, November 10, 2005 5:17 PM To: [log in to unmask] Subject: Re: [MSUNAG] Exchange Server SP2 Chris, Is your Exchange Server in a cluster? We have a two-node failover cluster... I always worry that what may be simple in a single server installation may cause me hair loss when applied to our clustered servers. Thomas P. Carter, Ph.D. Department of Chemistry Michigan State University East Lansing, MI 48824-1322 -----Original Message----- From: MSU Network Administrators Group [mailto:[log in to unmask]] On Behalf Of Harper, Chris Sent: Thursday, November 10, 2005 4:58 PM To: [log in to unmask] Subject: Re: [MSUNAG] Exchange Server SP2 Bill-- We've been up and running on Exch 2003 SP2 for about 2-3 weeks now, all seems to be stable and well. Haven't really taken advantage of TOO many of the new features, but at least we have them at our disposal... Chris Harper INFORMATION TECHNOLOGY SPECIALIST University Relations / Michigan State University Email: [log in to unmask] / Office: 517.355.6611 x 103 Web: http://ur.msu.edu / Cell: 616.291.1987 -----Original Message----- From: MSU Network Administrators Group [mailto:[log in to unmask]] On Behalf Of Wheeler, Bill Sent: Thursday, November 10, 2005 4:52 PM To: [log in to unmask] Subject: [MSUNAG] Exchange Server SP2 Hi-- Has anyone tried SP2 for Exchange Server yet? If so, any comments? Thanks! --Bill. Bill Wheeler, Systems Administrator Michigan State University Libraries (517) 432-6123 x 234 [log in to unmask]