Hi, I think this links will help you: http://www.microsoft.com/technet/prodtechnol/isa/2004/plan/exchage2003.mspx <BLOCKED::http://www.microsoft.com/technet/prodtechnol/isa/2004/plan/exchage 2003.mspx> http://www.msexchange.org/articles/2004protectexch.html <BLOCKED::http://www.msexchange.org/articles/2004protectexch.html> http://www.isaserver.org/tutorials/pubowa2003toc.html <BLOCKED::http://www.isaserver.org/tutorials/pubowa2003toc.html> http://msforums.ph/blogs/jpaloma/archive/2005/10/31/81297.aspx <BLOCKED::http://msforums.ph/blogs/jpaloma/archive/2005/10/31/81297.aspx> Best regards, Honório Côrte-real PT.COM - DER/GSI www.sapo.pt <BLOCKED::http://www.sapo.pt>