Yesterday i cleared my MCTS exchange 2007 Configuration exam. The Exam was properly designed and most answers required experience and hands-on. Preparation of any exam always give you an overview of the complete product and normally one gets to now the features which he normally ignored in day to day operations.
For this exam preparation i used following items;
1. MS self paced guide.
2. Virtualized Exchange 2007 Environment.
3. TechNet Exchange Articles.
4. Practice Tests.
MS self paced guide are very well written and normally it gives you 70% preparation rest is your practical experience and TechNet research.