CRM 2011 allows a user to define his/her own activity type. For example, if we want to conceptualize sale transactions as activities and report, analyze and view them on a par with the out-of-box CRM activities, we can define our new custom entity as an activity type. In 3.0 and 4.0 this would not have been possible (at least in a supported fashion); in CRM 2011 it is quite easy.When creating the custom entity, such as Sale Transaction below, check the boxes labeled Define as an activity entity and Display in Activity Menus , as shown below. Save, publish, and you are done!