CRM Releases and Updates
The following table details Update Rollups and Service Packs released for Microsoft Dynamics CRM. Note that some Update Rollups cannot be installed, so a backup before installation is advised. Click on the Build Number for more details.
New naming convention for updates starting with CRM 2015
Microsoft changed the naming convention for updates in this article, http://blogs.msdn.com/b/crm/archive/2015/04/14/new-naming-conventions-fo.... No more Update Rollups or Service Packs, just Updates.
For CRM 2013 onwards, the third number in the build is the same as the Update Rollup number.
A separate set of update rollups is released for CRM 2013 and CRM 2013 with SP1. Confused? See this article http://www.fkbase.info/crm2013UpdateRollups.
For more information refer to this blog: http://blogs.msdn.com/b/crminthefield/
This article, https://support.microsoft.com/en-us/kb/2925359, lists updates applied to CRM Online.
For more details on compatibility with other Microsoft products, review this article, http://support.microsoft.com/kb/2669061.
This article https://support.microsoft.com/kb/3036179 shows links for installations, updates and documentation for CRM versions since 4.0.