Part I introduces Exchange 2000 and examines its storage and routing architectures, and integration with AD. The information presented in this section is general in nature and covers topics broadly but not in much depth.

Part II deals with needs assessment and deployment planning, again without too much detail but with many helpful guidelines. 

Part III covers deployment topics including installation and upgrade, System Manager, and creating and managing recipients, public folders, storage groups, routing groups, administrative groups, and so on. Lots of good stuff here and a quick introduction for the advanced admin, but frankly I think my own book Administering Exchange 2000 gets more into the nitty-gritty of Exchange administration than this book does, and of course I'm totally unbiased in my opinion here <g>. There's a good chapter on coexistence with Exchange 5.5, but upgrading from Exchange 5.5 is covered only briefly in 3 pages. 

Part IV is a useful section on Exchange clients and covers everything from Schedule+ (ugh) to Outlook 2000 and OWA. 

Part V covers a variety of goodies including the Chat service, Instant Messaging, clustering, securing Exchange (i.e. PKI and KMS), and connectivity with X.400 and MS Mail systems. 

Part VI deals with monitoring Exchange, performing backups, performance tuning, and using various troubleshooting tools. 

I recommend this book, but because of the breadth of its scope some topics may not be covered in the level of detail which you might expect or hope for. 

I give this book stars out of five, and you can find it on Amazon here.