Hi Andrew, Thank you for your question. The main use cases for the D365/ACS connector are the following:Synchronizing contacts from Dynamics 365 to Campaign so they can be targeted in marketing campaignsSynchronizing custom entities from Dynamics 365 to Campaign so they can be used for segmentation and personalizationSending email marketing events (sends, opens, clicks, bounces) from Campaign to Dynamics 365 to display in the timeline viewSynchronizing opt-out (e.g., do not email) statuses betwe...