The Activity Log is the first place to look when investigating business-level synchronization issues.
Date/Time, Webshop, Direction, Module/Entity, Key, Action, Success, Message, and User/Run Context.
Filter by the correct shop.
Narrow down the time range and record.
Check direction and action.
Read the message in full.
Look up the corresponding API call.
Mapping missing
Target object already exists
Required field/SKU missing
API call failed
Processing completed
"Completed" means the process ended technically. Check the count and the target system if no data was changed.
