On NT 4 SP6 and EXchange 5.5 sp4 in an organization with 4 sites, my DSAMAIN.exe is running at 50% of my cpu all the time. Mad.exe, store.exe are both running fine. Everything works, Priv, pub & dir.edb are all consistent. I have mcafee & groupshield running and have found no virus on the computer. Any advice would be great. Thanks.