Check which Update Rollup version is installed on CRM

Browse to the CRM website.

Click on the “Help” button on the top right side of the window.

Click on “About Microsoft Dynamics CRM”

Get the build number displayed

Check build number with link below

http://crmdynamo.com/2010/03/check-which-update-rollup-version-is-installed-on-your-crm-environments/