A very nice free tool from U-B Tech, to calculate the cost of implementing Exchange 2010 vs 2003 / 2007:

The Exchange 2010 ROI tool showcases the financial benefits of implementing an Exchange 2010 messaging infrastructure in the organization.

One of Exchange 2010’s biggest advantages is using SATA based storage as its most optimized storage medium. This capability along with a 2-Node -cluster and better redundancy features make Exchange 2010 the most optimized, scaled and cost effective messaging solution.

Use U-BTech’s Exchange 2010 ROI tool to compare the costs of implementing Exchange 2003, 2007 and 2010 and try different cost variations including storage costs, hardware costs, licensing costs including Microsoft Cloud and more. Start comparing and make your choice today !

Download here: http://www.u-btech.com/downloads/exchange-2010-roi-tool.zipEnjoy !