How can you tell if vas is running dormant/disconnected? or how can you confirm the VAS host is re-authenticating with the domain.

Is there a vastool - or other command I can run to see if vas is running in disconnected/dormant mode?  We're making changes in AD that are not being reflected on some unix/solaris hosts.  or perhaps to confirm in QAS logs that it is communicating with one of the site DC's?