Every morning I notice that my Exchage Server memory utilization is high (Store.exe utilization is high even with no user ) and sometimes it refused smtp connection but after I restarted the server , it back to normal again (the store.exe consume memory almost 1/10 than before restart) . My exchange server is also DC and I just add another Exchange server in a member server . Before I added a Member Server in my Exchange it "never" behave like this. Please advise me , because it surely painfull if I must restart the server every morning. Thanks Boed