Two Microsoft Knowledge Base articles have been recently published to clarify and update Microsoft Support Policy on Exchange Tools. Microsoft Customer Support Services (CSS) supports the Microsoft Exchange Server 2003 tools that you can download from the Microsoft Download Center Web site. Support includes installation and usage of the tools, as well as errors encountered while using the tools.
CSS supports the Exchange Server 2003 tools that you can download from the Download Center
The Exchange Server Quota Message Service tool is supported by Customer Support Services