Folks, We have an exchange cluster with 2 physical nodes. Every 62 minutes they appear to be failing over - resulting in clients losing connection and then reconnecting. The disconnect and reconnect is invisible for alot of staff, however for some staff, they are promted for credentials and in most cases the re-entered credentials do not appear to work. Is this ringing any bells with anyone. Cheers

Hi, Are you talking about CCR setup here, Do you see any event log. Do you see high resource utilization like CPU and memory in server. Also check whetehr you are getting any alerts related to NIC adapter. Please post full details so we can help you. In the mean time you can read below article. http://blogs.technet.com/b/networking/archive/2008/11/14/the-effect-of-tcp-chimney-offload-on-viewing-network-traffic.aspx Anil

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If you ping the cluster from the client is it dropping out when Exchange fails over? I had a similar issue with a users being disconnected from a CAS array every 10 minutes. Turned out to be a vlan session setting. It wasn't the VIP itself but the VIP vlan.