To use OWA you have to install Exchange anyway, so the easiest way is to install the previous version of Exchange, and then immediately upgrade to Exchange 5.5 and apply the latest Exchange 5.5 service pack.
Dig Deeper on Outlook management
Related Q&A from SearchExchange Staff
Have a question for an expert?
Please add a title for your question
Get answers from a TechTarget expert on whatever's puzzling you.