Hello, After a small search for the term "cluster" and "nod 32 on exchange cluster" I didn't see any threads on this so hopefully I didn't overlook them. Ever since I installed NOD 32 on my exchange cluster, the ekern serivce seems to time out and then fail my exchange cluster. We are not using the actual version of NOD for exchange, we just have version 4 of it on the machine. The message that we get is: Timeout (30000 milliseconds) waiting for a transaction response from the ekrn service. After that happens once or twice, the whole cluster fails. I think I have added all of the exclusions that I need for a cluster and for exchange but I am still having the same issues. I have e-mailed my contact (that I bought nod 32 through) and have heard nothing back. If anyone has any ideas/suggestions please let me know.