Question

I am trying to add a Windows machine (server 2008 R2) to a domain programmatically using C#. I know I have the correct permissions to add the machine to the domain because I am able to add it manually through the windows UI. I also know that my ManagementScope is correct because when I create it I am able to query any WMI object that I want. I am trying to connect as follows:

ManagementClass computerSystem = new ManagementClass(scope, new ManagementPath("Win32_ComputerSystem"), new ObjectGetOptions());
ManagementObjectCollection computerSystemInstances = computerSystem.GetInstances();
ManagementObject baseObject = computerSystemInstances.ToList<ManagementObject>().First();

ManagementBaseObject inParams = baseObject.GetMethodParameters("JoinDomainOrWorkgroup");
inParams["Name"] = "my.domain.com";
inParams["Password"] = domainCredentials.FullUserName;
inParams["UserName"] = domainCredentials.Password;
inParams["FJoinOptions"] = 1;

var joinParams = baseObject.InvokeMethod("JoinDomainOrWorkgroup", inParams, null);

The method invoke does not throw any exceptions, but the error code value found at joinParams.Properties["ReturnValue"].Value is 1312. I can’t find any documentation anywhere (even on Microsoft’s MSDN page for the method) stating what this error code means. Does anyone know where to find what this error code is for?

Answer 1

In your code, you’ve transposed your username and password to the wrong variables. This may be the cause?