Are you changing the NIC setting on all cluster nodes? Which NIC are you changing? Public or Private network? From: exchangelist-bounce@xxxxxxxxxxxxx [mailto:exchangelist-bounce@xxxxxxxxxxxxx] On Behalf Of James Chong Sent: Tuesday, November 27, 2007 2:04 PM To: exchangelist@xxxxxxxxxxxxx Subject: [ExchangeList] Exchange 2007 IS Store Does not Fail over when NIC 100Full Anybody have any ideas as to why my cluster does not want to start the IS Stores when the NIC is set to 100Full? Tried today; doesn't want to start; all basic resources start cluster name; IP; NIC etc. System Attendant starts but not IS. Once I change back to Auto starts right up. Thanks James Chong Sr. Systems Engineer InPhonic, Inc. 11130 Sunrise Valley Dr. Reston, VA 20191 O (703) 657-4612 C (703) 863-1483