We’ve made several bug fixes based on community feedback.
Please go to our Mailbox Server Role Storage Requirements Calculator updates tracking page to see what is in this new version!
A blog post explaining the calculator is here and or you can download the calculator directly.
Read more at source: Released- v18.9 of the Exchange 2010 Mailbox Server Role Requirements Calculator
Cheers,
Anderson Patricio
http://blogs.msexchange.org/patricio
Twitter: @apatricio