After you complete a new installation of Exchange 2010 or after you add an additional Exchange 2010 server role to an existing Exchange 2010 server, you should complete the post-installation tasks. Because each server role offers several features that you can configure for your organization, make sure that you complete the post-installation tasks for each server role that you install.
Get it here: http://www.microsoft.com/en-us/download/details.aspx?id=35395
Cheers,
Anderson Patricio
http://blogs.msexchange.org/patricio
http://www.andersonpatricio.ca
Twitter: @apatricio