Microsoft Update Rollup 9 for Dynamics CRM 4.0 is now available. Released Feb 11, this update includes packages for the server, Outlook client and E-mail Router. Rollup 7 is a prerequisite for installing the Update.
For more information on the contents and procedure for installing Update 9, Follow this link to the Microsoft Support Site. To download Rollup 9, follow this link to the Micrsoft Download Site.