Lync Server 2013 on premises is licensed in the Server/Client Access License (CAL) model. There are two types of licenses relevant to this model.
- Client access
In addition to Server/CAL licenses, customers will need to acquire the appropriate client software licenses for their client devices.
A server license must be assigned to each instance of Lync Front End Server that is being run.
Client Access Licenses (CALs)
To access Lync Server 2013 as an Active Directory (AD) authenticated user, a CAL is required in most cases. A CAL is a license that gives a user the right to access the services of the server. There are three CALs for Lync:
- Lync Server 2013 Standard CAL (to use IM, presence, one-to-one audio, and video; Skype Connectivity)
- Lync Server 2013 Enterprise CAL (to use meetings – audio, video, and web conferencing)
- Lync Server 2013 Plus CAL (to use enterprise voice features)
The Standard CAL is the base CAL and required for all authenticated internal users accessing Lync Server functions. Enterprise CAL and Plus CAL are supplemental to the Standard CAL— customers can choose to add just the Enterprise CAL, just the Plus CAL, or both CALs to a Standard CAL.
Lync Server 2013 Client Access Licenses
The Lync Server 2013 Standard CAL offers instant messaging and rich presence (IM/P) features. It provides users with real-time presence and enhanced IM along with PC-to-PC audio and video communications, as well as authenticated attendee experience for internal Lync Meetings
The Lync Server 2013 Enterprise CAL offers Lync Meetings, including Audio, Video, and Web conferencing features. It provides users the ability to create, moderate, and join conferences for collaboration with both internal and external users
The Lync Server 2013 Plus CAL offers enterprise voice capabilities that can enhance or replace traditional PBX systems. These capabilities include common calling features such as answer, forward, transfer, hold, divert, release, and park, along with Enhanced 9-1-1 calling for North America, support for analog devices and a broad range of both IP and USB user devices from partners.
Device and User CALs
For each Lync CAL, there are two types of CALs available for purchase:
- User-based CAL (User CAL)
- Device-based CAL (Device CAL)
The choice between Device CAL and User CAL is based on customer preference.
With the User CAL, a CAL is purchased for each authenticated user who access Lync Server 2013 features, regardless of the number of devices the user will use to access Lync Server. Purchasing a User CAL may make more sense if users need roaming access to the corporate network using multiple, unknown, or additional devices than on-site users.
With the Device CAL, a CAL is purchased for every device that accesses Lync Server 2013, regardless of the number of users who use that device. Device CALs are useful for organizations whose workers share devices.
Examples of devices which connect to Lync Server 2013 features and require a license include, but are not limited to, are:
- personal computers (PCs) and
- IP phones
Devices which connect to Lync Server 2013 features and do not require either a user or device license include:
- Analog devices connected to Lync Server via a 3rd party gateway
- USB only peripheral devices for the PC
User Subscription Licenses (USLs)
Two USLs are associated with Office 365 and Lync Online. Plan 1-provides Presence, IM, peer-to-peer VoIP and Video, and Plan 2 adds Lync Meetings capability.
Lync 2013 client licensed via Office Professional Plus (and is also available as a standalone). Lync Windows 8 client is licensed via Windows Store and other mobile clients are available via the relevant platform store. Lync Basic 2013 client licensed via download from Microsoft.