OPC Server Computer Recommended Settings - Step 3 OPCENUM is responsible for providing a list of OPC Servers available on the computer where OPCENUM is installed. That's all. Only configure OPCENUM when you are experiencing problems when browsing the available OPC Servers on a computer. OPCEnum Properties: General Tab On the General Tab, we recommend that you leave the Authentication level to NONE.  We do NOT recommend that you change this setting unless you know what you are doing or are directed to by one of our support engineers. OPCEnum Properties: Location Tab Make sure that the Run application on this computer is the ONLY check box checked. OPCEnum Properties: Security Tab Again, our default/global DCOM security permissions (configured here) are sufficient where we can simply specify that all 3 of the options below accept the Defaults. OPCEnum Properties: Identity Tab On the Identity tab, you specify under what user account you want the OPCEnum to run under.  This is probably one of the MOST important settings for OPCEnum in some cases. Your configuration will most likely show the "System Account" being used. If that is the case then this is good news. It also means that OPCENUM is running as a Windows Service. OPCEnum Properties: Endpoints Tab - No changes required on this tab. You may now move on to configuring the OPC Client Computer DCOM settings. Warning: contents of this tutorial are Copyright Software Toolbox, Inc. 2001-2002, and may not be reproduced in electronic or written form without written permission of Software Toolbox Inc. Anyone found copying copyrighted material from this site for use on another site will be prosecuted. You are welcome to link to this site from your site. The information in this article is accurate to the best of our professional judgement at the time of writing but is subject to change.