Backup Exec job logs for audit purposes

My Backup Exec 2010 environment is currently setup to protect ~8TB of data on various servers/devices.

Our longest backup retention is 90 days.

Recently I was asked to produce proof that a file was backed up by Backup Exec from 9 months ago.

My job logs obviously don't have that information anymore.

I can configure BE Job logging to be detailed including directory and file but how do I keep the log or logs around for a longer period...say 1 year?