DCOM settings are not working

Question

I am working on Windows server 2022, where I tried doing DCOM settings for OPC communication. But the OPC server isn't communicating. Kindly guide for correct DCOM setting to be done specific to Windows server 2022.

<Moved from Windows 11 / Settings>

Answer 1

Hello

Thank you for posting in Microsoft Community forum.

Here are some steps you can follow to ensure the correct configuration:

Access the DCOM Configurator:

Open the Run dialog by pressing Win + R, type dcomcnfg, and press Enter. This will open the Component Services dialog box.

Navigate to DCOM Config:

In the Component Services dialog, expand Component Services, then Computers, and then My Computer. Select DCOM Config.

Modify OPC Server Settings:

Find your OPC server in the list of applications. Right-click on it and select Properties.

Go to the General tab and ensure that the application is set to run on this computer.

In the Location tab, make sure the "Run application on this computer" checkbox is selected.

Configure Security Settings:

In the Properties dialog, go to the Security tab.

Under Launch and Activation Permissions, select Customize and click Edit. Add the necessary users or groups and grant them Local Launch, Remote Launch, Local Activation, and Remote Activation permissions.

Under Access Permissions, select Customize and click Edit. Add the necessary users or groups and grant them Local Access and Remote Access permissions.

Adjust Authentication Levels:

In the Properties dialog, go to the Identity tab and ensure that the correct user account is selected to run the application.

Ensure that the authentication level is set to Connect or higher.

Check Firewall Settings:

Ensure that the necessary ports for DCOM and OPC communication are open in the firewall settings.

Best Regards,

Wesley Li