Running Windows 2000 Server SP3, Exchange 2000 Server SP3 on same DC. About every 8-10 hours, our System Attendant (MAD.EXE) uses 100% of the CPU, then we get the following Event ID's in the Application log which fills this log within seconds. Event - ID 8031 Source - MSEXCHANGE AL Category - LDAP Operations Unable to open LDAP session on directory 'name of server.com' using port 389. Directory returned the LDAP error [0x50] other. We''ve ran the update for MSBLAST. Virus Software is currently updated. When this happens, our Exchange services are running but nobody can connect to it. Anyone have this issue before as I have been searching everywhere and can't find a real solution for this problem. Thanks in advance, Mike Mike Dufoe System Administrator ETI Canada Inc. 350 Dupont Road North Bay, ON P1B 8K2 705-472-1300 ext.346 dufoem@xxxxxxxxxxx ----------------------------------------------------------------------- Ó¿Õ Who's Watching Your Network? Ó¿Õ The information contained in this message may be confidential or protected from use or disclosure by law. Any distribution, unauthorized use or copying is strictly prohibited. If you have received this message in error please notify the sender and delete the email.