I have an exchange environment with approximately 75 mailboxes and about that in AD Users. I need to upgrade to 2012/2013. I am getting conflicting directions in how to perform this upgrade. I have purchased Volume Lic. for Exch 2013/Serv 2012, and will be using a new box.
It has been suggested to install Win Serv 2012 with Exch 2008 (downgrade rights) in the new box, then co-exist it with my current server environment. After its running for a few weeks, upgrade the new box to Exch 2013.
Can someone please explain the steps to perform this, as well as any suggestions. Thank you.