DLL Filter (installed on all domain controllers)

Operating system:
Windows Server 2003 or 2008 with latest service pack.

Additional software:
.NET Framework 3.5 SP1

Web Service (installed on a web server inside or outside of your network)

Operating system:
Windows Server 2003 or Windows 2008 with latest service pack
IIS

Additional software:
PowerShell
Microsoft Online Services Migration Tools