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You can supply settings in parameters for the calls to CoInitializeSecurity or CoSetProxyBlanket in C++. However, for the authentication service, it is recommended that you specify RPC_C_AUTHN_DEFAULT and allow DCOM to choose the appropriate service for the target computer. For more information, see Setting Client Application Process Security. You can change these settings in the connection call. Your local system may use different defaults that the target remote system does not accept. WMI has default DCOM impersonation, authentication, and authentication service (NTLM or Kerberos) settings that the a remote system requires. Setting Namespace Security to Require Data Encryption for Remote ConnectionsĭCOM Impersonation and Authentication Settings for WMI.Allowing Users Access to a Specific WMI Namespace.Setting DCOM Security to Allow a User to Access a Computer Remotely.DCOM Impersonation and Authentication Settings for WMI.The following sections are discussed in this topic: Your local machine may use different defaults that the target system does not accept. WMI has default impersonation, authentication, and authentication service (NTLM or Kerberos) settings that the target computer in a remote connection requires. To connect to a remote computer using WMI, ensure that the correct DCOM settings and WMI namespace security settings are enabled for the connection.