HTTP Proxy gives "Error fetching group names" when downloading groups from the Windows Active Directory

This issue can have several causes:

• The clock of the Active Directory Server and the Endian Firewall are not synchonized.
  You should let the Active Directory Server use the NTP Server of the Endian Firewall in order to synchronize its clock. Endian Firewall's clock will be synchronized with public Timeservers.
  
  In order to check if this is  really the problem you can temporarily synchronize the firewalls clock with the clock of the Active Directory Server by starting the following command:
  
  net time set -S IP_OF_YOUR_AD_SERVER
  
  

Automatic/scheduled time synchronization does not appear to be working in EFW 2.1. It looks like the configuration files are there, but not getting read nor processed. This feature is needed to correct the time drift of running the 2.6 kernel in a virtualized session.