Most extensive Exchange 2003 reference found on the market from one of the world's leading Microsoft server experts. It is revised based on feedback to include more hands-on administration content, based on the author's experience implementing Exchange 2003 in corporate environments since Beta release 1. It contains hard-to-find intermediate to advanced coverage beyond the competition's typical installation and set-up how-to's including: planning, migration, security, disaster recovery, and troubleshooting. The revised edition of "Microsoft Exchange Server 2003 Unleashed" incorporates technology updates as well as public comments on suggested revisions and additions to the original content. This revision will specifically strengthen the content of the book in the areas of Exchange server clustering, administration, and management. This interim release of the book is needed to keep the title current. The next major release of Exchange will not be available until 2007 / 2008.