Some time ago I blogged about the Acctinfo2.dll tool and how unfortunate it was that a 64-bit version was not available. Well, the good news is that you can now download a 64-bit version from here:
I have tested the DLL on both Windows Server 2008 and Windows Server 2008 R2 and it seems to work well. However, please note this version is completely unsupported! Download at use entirely at your own risk.