A mounted database can be an active mailbox database that is mounted for use by clients, or a passive mailbox database that is mounted in recovery for log replication and replay.
While you can create more databases than the limits described above, you can only mount the maximum number specified above.
The recovery database does not count towards this limit. In this example a single Mailbox server running Standard Edition has 5 mailbox databases.
All 5 databases will be able to mount, and an additional recovery database can also be created and mounted for any data restoration scenarios.
CALs are not something you would activate in client machine or server.
-For Primary Contact folder on Outlook 2007 & 2010 for Windows.
Both Standard and Enterprise editions provides same functionality and management features.
The only difference is number of mailbox database supported by each editions.
When you purchase your Exchange Server 2016 server licenses you'll be provided with a license key that needs to be entered on the server.
The license keys determines which server edition is installed, there is no different in installation media or installation method for each edition.
Both CALs can also be used to make use of full features of Exchange server. Bipin enjoys writing articles and tutorials related to Network technologies.