| Shared Activities limit | Up to 50 contacts but only 1 lead per task or event | |
| Shared Activities setting | Activity Settings: Allow users to relate multiple contacts to events and tasks | |
| Turning Shared Activities off | Not possible once enabled | |
| Primary contact | Required; if deleted, the next related contact becomes primary | |
| Roll up to primary account | Requires Shared Activities; needs Customize Application and Modify All Data | |
| Rollup setting change | Affects new activities only, plus existing ones when recalculated | |
| Task to people or groups (Lightning) | Up to 200 people, each gets an independent copy | |
| Enable Group Tasks setting | Salesforce Classic only; group tasks are on by default in Lightning | |
| Task queues | Set up only by admins; members see the queue list view | |
| Queue task notifications | Sent only after reassignment from the queue to a user | |
| Task Status closed flag | Each value is open or closed; several values can be closed | |
| Public and resource calendars | Setup, Public Calendars and Resources; Customize Application | |
| Object calendar | Built on the Calendar tab from any date field on a standard or custom object | |