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 Microsoft phases out older Exchange Server versions, IT leaders are facing new decisions about how to stay compliant and cost-efficient. Understanding the current licensing landscape for Windows ...

Organizations using servers with more than 16 cores need to "stack" multiple Windows Server licenses to cover all cores, ensuring compliance with licensing requirements. Here's how. Licensing a ...

Monday at the TechEd IT Forum in Barcelona, Microsoft announced that its widely awaited server virtualization technology, previously code-named Viridian, will hereafter be known as Hyper-V. Microsoft ...