The icwlog.txt found in C:\Program Files\Microsoft Windows Small Business Server\Support\ only shows somewhat generic errors about the Firewall Rules and an inability to bind to port 443.
It just so happens that this SBS box is a dual Xeon 5345 series box. That means eight (8) cores.
Looking into the logs, we find the reason:
Event Type: ErrorAnd the fix?
Event Source: Microsoft ISA Server Control
Event Category: None
Event ID: 14109
Computer: computer name
Description: The ISA Server Standard Edition cannot run. Either the server is using more than 4 processors, or it is configured to use the Active Directory service. Use the source location 100.2126.96.36.1991.50 to report the failure. Contact Microsoft (R) Corporation for more information.
Obtain the latest ISA 2004 Standard Edition service pack.
Microsoft Knowledgebase: KB884569: The ISACTRL and WSPSRV services do not start when you install ISA Server 2004 on a multiprocessor computer.
Microsoft Small Business Specialists
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