There is not enough room in this chapter to outline all detailed changes made in ISA Server 2000 and 2004, but you can find a comprehensive treatment of the material on your ISA media. We strongly recommend reviewing this information by inserting the ISA Server installation CDs, and clicking the Read Migration Guide link.
The Migration Guide is a file in the root of both the ISA Server 2004 Standard Edition and ISA Server 2004 Enterprise Edition installation CDs called Isa2000Migrate.htm. Reading this document saves you a lot of time searching for items that have been renamed or changed.
Here are a select few of the many changes you will encounter when upgrading to ISA Server 2004:
Report jobs aren't migrated Because of changes in the reporting structure, reports configured on ISA Server 2000 can't be migrated. You will need to recreate report jobs.
Active caching is no longer available This feature was removed from ISA Server 2004.
Bandwidth rules aren't supported This feature is also no longer available in ISA Server 2004, even though (until Service Pack 1 is applied) the tab still appears in the interface.
Any system access control lists (SACLs) configured are reset to defaults You will need to reconfigure these SACLs.
Log configuration settings are returned to defaults Because of advances made in logging functionality, you must reconfigure log configuration settings.
Packet filters can't be directly configured You can take advantage of the much richer multinetworking functionality in ISA Server 2004—when you migrate, ISA Server 2000 packet filters are transformed into access rules.
Protocol rules and site and content rules replaced with access rules ISA Server 2004 reinterprets protocol rules and site and content rules as access rules, sometimes combining them into a single access rule.
Policy elements change Client address sets become computer sets. Destination sets become domain name sets, URL sets, or computer sets, depending on the configuration.
Again, reading through the Migration Guide, available on the ISA Server installation CDs, provides more comprehensive information on what the differences are and how ISA Server 2000 components and functions translate into ISA Server 2004 Enterprise Edition.