this exception 

 Client connection to WINMGMT needs to be encrypted for this operation. 
Please adjust your IWbemServices proxy security settings and retry. 

I try to set different setting in the connectOptions but the problem still 
happens.

Any idea?

Thanks,

Larry

 //set connection parameters for remote machine  		
               connectionOptions.Username = adminUser;
               connectionOptions.Password = adminUserPassword;
               //connectionOptions.Authority = "Kerberos:" + Domain + "\\" + 
serverName;
               //connectionOptions.Authentication = AuthenticationLevel.Call;
               //specify WMI path for remote machine 				
               wmiPath = String.Format(@"\\{0}\root\cimv2", serverName);
               return new ManagementScope(wmiPath, connectionOptions);

You must add the following code:
connectionOptions.Authentication = AuthenticationLevel.PacketPrivacy;


On Jul 20, 5:36 am, hello321 
wrote:

>  this exception
>
>  Client connection to WINMGMT needs to be encrypted for this operation.
> Please adjust your IWbemServices proxy security settings and retry.
>
> I try to set different setting in the connectOptions but the problem still
> happens.
>
> Any idea?
>
> Thanks,
>
> Larry
>
>  //set connection parameters for remote machine                
>                connectionOptions.Username = adminUser;
>                connectionOptions.Password = adminUserPassword;
>                //connectionOptions.Authority = "Kerberos:" + Domain + "\\" +
> serverName;
>                //connectionOptions.Authentication = AuthenticationLevel.Call;
>                //specify WMI path for remote machine                            
>                wmiPath = String.Format(@"\\{0}\root\cimv2", serverName);
>                return new ManagementScope(wmiPath, connectionOptions);