AADConnect-ChangedDirSyncSettings.kql

AuditLogs
| where OperationName has "Set DirSync feature" 
| where Category has "DirectoryManagement" 
| where parse_json(tostring(TargetResources[0].modifiedProperties))[0].displayName == "DirSyncFeatures" 
| extend NewValue = parse_json(tostring(parse_json(tostring(TargetResources[0].modifiedProperties))[0].newValue))[0]  
| extend OldValue = parse_json(tostring(parse_json(tostring(TargetResources[0].modifiedProperties))[0].oldValue))[0] 
| extend UserPrincipalName =  parse_json(tostring(InitiatedBy.user)).userPrincipalName 
| extend IPAddress =  parse_json(tostring(InitiatedBy.user)).ipAddress