A CAL is required for each user or device (depending on the license) accessing the server. Either version of the CAL may be run against either version of the server.
Extracted from http://www.microsoft.com/exchange/2007/evaluation/editions.mspx
If managing Active Directory using Windows Powershell® is making you feel like you stepped back in time, you are not alone. For nearly 20 years, AD admins around the world have used one tool for day-to-day AD management: Hyena. Discover why.
In this video we show how to create a Resource Mailbox in Exchange 2013. We show this process by using the Exchange Admin Center.
Log into Exchange Admin Center.:
Navigate to the Recipients >> Resources tab.: "Recipients" is our default selection …