squatter doesnt work with virtual domains

[Ramprasad]

Hi,
   I have a cyrus 2.3.7 intallation with virtual domains
All primary domain users have usernames as uid only and the virtual
domain users have usernames as full email id


When squatter is run , I find that only the primary domain users
mailboxes are "squatted" . Is there something special to be done for the
other domains

Thanks
Ram