KB 2449283 Update Rollup 15 for Microsoft Dynamics CRM 4.0 is available for download at http://www.microsoft.com/downloads/en/details.aspx?FamilyID=a43147c9-e87e-41b3-bf46-ac1244a0475c&displaylang=en
Update Rollup 15 contains a cumulative set of updates and hotfixes. For more information see Article ID 2449283 at http://support.microsoft.com/default.aspx?kbid=2449283
I’d recommend reading the article before getting started so you understand what’s involved including the prerequisites. As always, I’d suggest doing a full backup of the MSCRM databases and even exporting customizations as a precaution. Also, I’d suggest installing this in your test environment and then testing for server and user issues before implementing it in your production environment.
