http://blogs.msdn.com/b/emeadaxsupport/archive/2011/09/20/synchronizing-ax-to-outlook-cannot-edit-a-record-in-activities-smmactivites-an-update-conflict-occured.aspxWe recently came across a problem with Outlook synchronization with the AX2009 client. The problem was that sometimes when a user synchronized it failed with the error message: "Cannot edit a record in Activities (smmActivites). An update conflicten-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)