Hi Mike,
You'll want to check out Solution-soft's (solution-soft.com) Time Machine virtual clocks tool that safely gets around Windows domain issues related to Active Directory (kerberos) in application testing. Can test in future, past, speed up your virtual clocks, etc., all safely. System clock still used for log and file stamps, etc. Extremely useful and time saving tool. Besides Windows, versions are also available for UNIX and Linux. You can also download from the Solution-Soft website for a free POC. Roy Sampson