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Current Visibility: Visible to all users. Likewise, if you manage the devices on your network by using management software such as Microsoft System Center, a Management License ML may be required for the device being managed.
Licensing software with CALs and MLs can be complicated due to the technical nature of server products and networks. In addition, an External Connector EC license is offered for some products as an optional alternative to address specific customer scenarios. This overview is for reference purposes only. Before purchasing, you should visit the "How to Buy" section for each product and consult your Microsoft representative or local reseller regarding your specific licensing needs.
With the User CAL, you purchase a CAL for every user who accesses the server to use services such as file storage or printing, regardless of the number of devices they use for that access. Purchasing a User CAL might make more sense if your company's employees need to have roaming access to the corporate network by using multiple devices, or from unknown devices, or if you simply have more devices than users in your organization.
Device CALs. With a Device CAL, you purchase a CAL for every device that accesses your server, regardless of the number of users who use that device to access the server. Device CALs may make more economic and administrative sense if your company has workers who share devices, for example, on different work shifts.
External Connectors. If you want external users—such as business partners, external contractors, or customers—to be able to access your network, you have two licensing options:. External Connector licensing. An EC license assigned to a server permits access by any number of external users, as long as that access is for the benefit of the licensee and not the external user.
Each physical server that external users access requires only one EC license regardless of the number of software instances running. An "instance" is an installed copy of software. The right to run instances of the server software is licensed separately; the EC, like the CAL, simply permits access.
Under the Per Core model, when the server software is running in the physical OSE, you must license all physical cores on the server. Starting with Windows Server Standard edition and Datacenter edition, Microsoft introduced a new licensing model. This new model is based on the cores in the server, where as previous Windows Server licensing models were based on processors.
Although the licensing model has changed, one thing has stayed consistent… the need for CALs! Want to learn more about Core-Based Licensing? However, the Windows Server OS license does not give them the legal right for users or devices to connect to the server… that is where CALs come in! This two-component license models provides a low entry price and a way to pay for capacity used: the more devices or users accessing the server software, the greater the license fees or price.
This model therefore offers license affordability to organizations of all sizes. What are the different types of CALs? Does the organization have roaming employees who need to access the corporate network from several devices?
In this case, User CALs make the most economical and administrative sense.
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