Backup to tape only last 7 days - last access date issue

I have moved to backing up my virtual Exchange and file servers using Veeam.  I want to write those Veeam backups to tape with Backup Exec.  I want to use a rolling 7 days to each tape.

I have my policy set with /ACCESSDAYS:07.

However, I have a robocopy mirror jobs that runs daily on those file to copy them to another server, and I think this is messing with the Last Access stamp.

What's the best way for Backup Exec to do this?