I have noticed this error occurs every 5 minutes on a W2k3 DC from the ISA server. Everything is working... I suspect that it is the message screener running on the Exchange server Have I missed something in configuring DCOMCNFG for W2k3 DCOM got error "General access denied error " from the computer proxy when attempting to activate the server: {0820D243-0B18-4B0A-88F0-D857F0C91E62} Thanks in advance Darryl Janetzki