There are many exchange tools on the web but this has been the most useful I have ever encountered. It provides a the bulk of what you need to know about an exchange organization. Every exchange admin should have this in their toolbox. Its called the Exchange Environment Report, it was developed by Steve Goodman Microsoft MVP.
This Report is like a Swiss Army Knife of reports. It provides a comprehensive view on the exchange organization, from roles to database health, backup information, DAGS, mailbox counts, etc.. it includes this and more!
Enough bragging about it, you can get more information and a copy at Steve’s website or a direct download here. I would like to thank Steve for writing this awesome tool. Don’t forget to send him a message on Twitter!