User account configurations for the OPC server

When configuring the account used to run the OPC server, include the account in the ACLs and in the dcomcnfg Identity tab.

If the OPC server runs as a Windows service, the account specified in the Identity tab must be the same as the account specified in the Log On tab on the Service Properties window.

To view the account that is running an OPC process, check the Processes tab of Windows Task Manager.