For Customer to Account table integration: Existing records coupling between D365 Sales and BC records is success, new records from D365 Sales are created in BC. But new records from BC to D365 Sales is failure.
Error message is: “An error occurred when communicating with Dataverse. Detailed description: Object reference not set to an instance of an object.”
And performed a fresh connection with Dynamics Sales sandbox, from then onwards we are facing this issue.