The appointment organizer is a key field for appointment synchronization. It drives different synchronization behaviors. For example, only the Dynamics 365 appointment organizer can synchronize and distribute appointments from Dynamics 365 to Exchange attendees. When you create appointments using customizations such as Power Automate or custom code, make sure the organizer is specified correctly. The organizer field isn't exposed on the appointment form by default. You can add it to forms, views, or advanced find queries, as needed, to confirm the value is present and correct., Tasks created in Loop can sync with Microsoft Planner and To Do. Here's how you can leverage this: Access Tasks in Planner: When you create a task list in Loop, it syncs with Planner, creating a corresponding plan. You can view and manage these tasks in Planner or the "Tasks" app within Teams., Appointments, contacts, and tasks are set to use server-side synchronization. For more information, see Connect to Exchange Online and Server-side synchronization. Synchronization filters determine the records that sync between Dynamics 365 and Exchange using server-side synchronization..