Use the UnregisterPlugin command to discontinue using an external security module with a repository. If you unregister the external security module, PowerCenter switches to repository authentication mode. All user passwords reset to the values in the repository instead of the values in the external directory. When you unregister the security module, you do not lose the mapping between the user names and the external security login names unless you enter the -g option. Use the mapping again if you register a new security module.