On the 18th of March 2001, Microsoft launched ISA 2000. ISA 2000 begin the Standard and Enterprise version which ISA continues to ship beneath, with Enterprise- grade functionality for example High-Availability Clustering not included in the Standard Edition. ISA 2000 requisite Windows 2000 ,and will as well run on Windows Server
2003. In agreement with Microsoft's Support Lifecycle strategy, ISA 2000 was the first ISA product to use the 10 year sustain lifecycle with 5 years of Mainstream support and five years of comprehensive support. ISA 2000 reaches End of Life on the 12th of April 2011.