CiviCRM Community Forums (archive)

We loaded thousands of contacts using the batch import into CiviContact and now our client wants these members to be available for Drupal Forums.  Its our understanding that the user database in Drupal is used to populate membership for Forums.  In our case the number of Drupal Users in the database is significantly less then the number of members in CiviContact.  We see that there is a 'synch User with Member' admin function, but we would need the synch to go the other direction.  Is there an easy way to do this?

Any help would be appreciated...

Thanks!

Rich