Types of CALs:
·
User CAL
·
Device CAL
User CAL:
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 employees
need to have roaming access to the corporate network using multiple devices, or
from unknown devices, or simply have more devices than users in your
organization. You can go for User CAL if number of User is less than number of
devices.
Device CAL:
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.
A SharePoint Server device CAL authorizes one
computer to access SharePoint Server, regardless of the number of users (for
example, a shared workstation).
SharePoint Server User CALs are also available. A user CAL authorizes a user to access SharePoint Server from any device (for example, when an employee accesses the server from a computer at work and another at home).
SharePoint Server User CALs are also available. A user CAL authorizes a user to access SharePoint Server from any device (for example, when an employee accesses the server from a computer at work and another at home).
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:
·
Acquire CALs for each of your external users.
·
Acquire External Connector (EC) licenses for each
server that will be accessed by your external users.
For SharePoint, Acquire
External Connector (EC) licenses would be the right choice.
Specialty Server Licensing
Specialty Server licensing is a commonly used model. Specialty
Servers are server-only licenses that also do not require CALs. Specialty
Servers require a server license for each instance of the server software
running on a server. An example of this is Microsoft Office SharePoint Server
for Internet Sites. You can run the instance in a physical or virtual operating
system environment. By exception, some products provide more specific use
rights.
Source: http://www.microsoft.com/licensing/about-licensing/client-access-license.aspx
You can get more details from Microsoft Support as well, refer to the following URL
Chat with Microsoft Volume licensing support team
