Resharper has Adjust Namespaces which allows you to correct the namespaces of all files in a folder, project, or solution.
Is there a feature or plugin available for CodeRush/Refactor that is comparible to Resharper's Adjust Namespaces feature.
There is no built in equivalent feature at the current time.
However there is a rich ecosystem of plugins for CodeRush, which includes CR_SyncNamespacesToFolder
This would seem to provider the feature you're looking for.