To ensure that only logs for bill documents that are no longer needed are archived from the system, the retention period relating to the creation of the log must have expired. You define the retention period in Customizing:

Customizing for SAP Utilities under  Tools Archiving Define Retention Period for Bill and Payment Advice Note Data

Depending on the selection criteria you enter, the archiving report can also select logs for bills that have not yet been completed.

You can use the INV_REMADV_LOG_ARCHIVE Business Add-In (BAdI) to define additional checks for the archiving of logs. For more information, see the documentation for the BAdI.