Hello, I continue receiving the following message even though I am logged in to the server with an administrator user account that is a member of all three mentioned groups. I have tried to run this tool both on a W2K domain controller and on the W2K Server to be used for ISA installation, regardless the same error is produced. It is a single tree, one domain forest with only one domain controller. Any ideas of what else to try or check? Thanks in advance! Charles Cutz B.A.Sc. EE, MCSE, MCP, Citrix CA, A+ Systems Engineer Interactive Technologies, Inc. Voice / Fax Tel. 1-888-522-4554 To download & install the latest version of Adobe Acrobat Reader click the link below: http://www.adobe.com/products/acrobat/readstep2.html