lookBackPeriod

The number of hours for change log to look back from when you last synchronized your data. You can look back up to 7 days or 168 hours.

Change log updates your index only if new content was added since you last synced your data. Updated or deleted content from before you last synced does not get updated in your index. To capture updated or deleted content before you last synced, set the LookBackPeriod to the number of hours you want change log to look back.