They give clients "permission" to access servers. If a client accesses a server and there's no CAL for that client, you're in violation of your licensing agreement. They're kept on paper basically.

As of August 1, Microsoft will raise the prices of a number of its User client-access licenses (CALs) by 13 percent. The affected CALs are for on-premises, not cloud, products. The prices of Device ...

Microsoft announced this week that it is making a change to its Core CAL (Client Access License) bundle-- something of interest to its business customers who purchase enterprise products. Microsoft ...

Microsoft is boosting the price of a client license but sweetening the deal by giving buyers access to a new endpoint security product and the new Lync unified communications software. Microsoft is ...

Microsoft said it plans to move some features in the Enterprise Client Access License offering into the Core CAL. The announcement of the changes came by way of last week's Microsoft Management Summit ...