Activity typed Entity – Display in Activity Menus

Upon creating a custom entity as Activity Entity and not checking the “Display in Activity Menus” option, there is no supported way to alter this.

However, here is the unsupported approach (in SQL):

UPDATE Entity SET ActivityTypeMask = 1 
WHERE EntityId = (SELECT EntityId FROM Entity 
WHERE Name = 'custom_entity_schema_name')

After this minor adjustment, a publish in CRM is needed on that entity and it will be visible under activities menu (with all its views).

Hope this will help you avoid any future headache 🙂