Netbackup and Truncating logs on Microsoft SQL Server

Hi,

 

Can someone at Symantec please confirm that the following is true:  When Netbackup performs a backup of Microsoft SQL Server with the truncate logs option enabled; it will only clear out the contents of the log files and not reduce their size?

 

If this is the case, is there a Netbackup feature to both truncate and reduce the actual size of the log file on disk?

 

David