Unable to Delete unused Domain from scope of Management

Unable to Delete unused Domain from scope of Management

 The Scope of Management shows our Domain and another named "Workgruip". Workgruip shows as having no computers in it, but when we try to delete it, we get an error message saying that one or more of the computers in Workgriup has the Desktop Agent on it and that the program needs to be uninstalled before Workgriup can be deleted. Since we show no computers in the group we cannot uninstall the agent.

  How can we get rid of this non existing Domain?

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