Lync Server 2010 Licensing
ON PREMISE LICENSING:
Lync Server 2010 on-premises is licensed in the Server / Client Access License (CAL) model.
There are three types of licenses:
1) server licenses,
(2) client access licenses,
(3) external connector licenses.
A license must be assigned for each instance of the server software that is being run.
The Lync Server 2010 is sold in two editions:
Client Access Licenses (CAL)
To access Lync Server 2010, a Client Access License, or CAL, is required. A CAL is not a software product; rather, it is a license that gives a user the right to access the services of the server.
There are three CALs for Lync:
Enterprise CALs and Plus CALs are additive-they are sold as a supplement to the Standard CAL. This means that to enable Standard CAL features for a user, the user must be licensed with just the Standard CAL. To use either the Enterprise CAL or the Plus CAL features, the user must be licensed with one (1) Standard CAL and either one (1) Enterprise CAL or one (1) Plus CAL.
To enable all features, a user must be licensed with all three CALs.
Finally, each CAL works with either the Standard Edition or Enterprise Edition of the Server.
Device and User CALs
For each Lync CAL, there are two types of CALs for purchase:
With the User CAL, you purchase a CAL for every authenticated user who accesses Lync Server 2010 features, regardless of the number of devices they use for that access. Purchasing a User CAL may make more sense if your users need to have roaming access to the corporate network using multiple devices, unknown devices, or more devices than users in your organization.
With a Device CAL, you purchase a CAL for every device that accesses Lync Server 2010 features, regardless of the number of authenticated 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.
The decision between Device CAL and User CAL is financial, and you have the option to choose based on your needs. Additionally, in the case where neither the device nor the user is authenticated, a CAL is not required.
External Connector Licenses
If you want external users who are not your employees-such as business partners, external contractors, or other temporary staff-to be able to access your Lync Server 2010 as authenticated users, you have two licensing options:
An EC license is an alternative to CALs for each server that external users will access. An EC license assigned to a Lync Server 2010 permits access by any number of external users like Students. Each physical server that is accessed by external users requires only one EC license regardless of the number of instances running.
There are three External Connectors for Lync Server 2010:
The decision between CAL and EC is financial, and you have the option to choose based on your needs.
In order to access the functionality of Lync Server 2010 and have an authenticated experience, you need the Lync client application.
Lync has one client: Microsoft Lync 2010
You can purchase Lync 2010 as a standalone application or as part of the Office Professional Plus 2010 suite.
How to Deploy Lync Licenses On-premises
A server license is required for each physical or virtual instance of the Lync Server 2010 Front End Server Role (required with every Lync deployment). Both Standard and Enterprise editions can be installed and configured in many server roles on a server running Microsoft Windows Server®. Server roles are Lync Server 2010 instances which run a specialized set of functionality, such as audio/video conferencing, edge services, or mediation between Enterprise Voice and the PSTN.
Some roles are considered additional software and do not require a license. For these roles, you may run any number of instances directly with the Front End Server role.
Lync 2010 Server Standard and Enterprise editions can be installed and configured in many server roles on a server running Windows Server. Server roles are Lync Server 2010 instances which run a specialized set of functionality, such as audio/video conferencing, edge services, or mediation between Enterprise Voice and the PSTN.
The Front End Server role is required for every deployment, and each instance requires a license.
***Most Server roles are considered "additional software" and do not require a license.
For more on Lync Server 2010 Roles refer to TechNet. HERE
Server Role Descriptions:
Client Access Licenses
CALs are required for each user or device that will access instances of the Lync Server 2010 roles. Each server instance may provide different functionality to the user, and therefore not all servers in your Lync architecture/topology require a CAL.
For example, if you deployed the Lync Server 2010 Front End Role (required of any Lync deployment) and also deployed Lync Server 2010 in Web Conferencing Server Role, you would need the Lync Server 2010 Standard CAL for the rich IM and presence features, and the Lync Server 2010 Enterprise CAL for the online conference features. This example would not require the Plus CAL.
Figure 1 lists the CAL requirements for different server roles.
The feature details for server and CAL licensing are described in the Lync Server 2010 Feature Details section.
Licensing External Users
External users may require a license in order to access a Lync Server 2010. There are four types of external users that may access a Lync Server 2010:
A federated user is an external user that possesses valid credentials with a federated partner and is authenticated on that basis by Lync Server 2010. Federation is a feature provided with your licenses of Lync Server 2010. Users connected by federation with another partner do not require a CAL or External Connector License.
An unauthenticated, or anonymous, user is a person/device that does not have an identity in the Active Directory® Domain Services. Unlike a federated user, an anonymous user is not authenticated. You do not require licenses for unauthenticated users of Lync Server 2010.
External Authenticated Users
An EC license permits an unlimited number of authenticated external users to access a Lync Server 2010 in scenarios where the number of CALs is uncertain. The number of EC licenses required corresponds to the number of physical Lync Server 2010 servers, regardless of the number of instances. The specific EC required is determined by the equivalent CAL features the external users would require. The following lists available EC licenses and the equivalent CAL features:
Public Instant Messaging Users
Lync Server 2010 provides organizations with the capability to connect their existing base of Lync Server 2010-enabled users to the top public IM service providers. Licensing requirements for Public IM Connectivity depends on the service providers you want to connect with, and your Lync Server 2010 CALs.
Lync Server 2010 Feature Details
A Standard Edition server is ideal for pilot and lab deployments or branch offices that do not have high availability and performance requirements. It is intended for deployments with fewer than 5,000 users either in total or at a particular location.
An Enterprise Edition server has all of the Standard Edition server features; however it provides scalability and high availability. It is intended to allow an unlimited number of users in any location/configuration.
Comparison of Standard and Enterprise
See Figure 2 for summary features differences between Standard and Enterprise server versions.
Figure 2: Lync Server 2010 Standard and Enterprise Features
Lync Server 2010 requires Windows Server® and Microsoft SQL Server® to run and may not include licenses for those products. Be sure you have the correct licenses for Windows Server and SQL Server.
Figure 3: Supported Windows Server and SQL Server Versions
Lync Server 2010 Client Access Licenses
The Lync Server 2010 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. Additionally it provides users with authenticated attendee experience for internally hosted conferences.
The Lync Server 2010 Enterprise CAL offers the 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 2010 Plus CAL offers enterprise voice telephony features. It provides high-quality voice and other related features to users anywhere with an Internet connection across IP phones, PCs, and desktop applications.
New and Improved Features of the CALs
The following tables (Figures 4-6) provide a detailed feature breakdown for each Lync Server 2010 CAL.
Figure 4: Instant Messaging and Presence
Figure 5: Audio, Video, and Web Conferencing
Figure 6: Enterprise Voice Technology
For each Lync Server 2010 CAL, there are other possible prerequisites for underlying Microsoft technologies-primarily dependent on the features you would like to utilize. The following Microsoft products may be required with Lync:
Licensing for Microsoft-hosted Lync Online
Lync offers the flexibility to license Lync Server 2010 for an on-premises deployment, or you may decide to work with a Microsoft-hosted service to give some or all of your Lync users access to the capabilities of the product.
This approach allows you to enjoy the benefits of enterprise-class communications in a pay-as-you-go model that enables you to scale up or down as needed, minimizing your financial risk.
How to Subscribe to Lync Online
Lync User Subscription Licenses
Rather than purchasing server licenses for each Server and user/device that uses Lync Server 2010, Lync Online is licensed via a subscription model in which each user needs a User Subscription License (USL).
Microsoft currently offers the following USLs for Lync Online:
Lync Online USL Features
The features offered in Lync online are similar to the features offered in Lync on-premises.
The following provides a high-level feature for each Lync Online USL:
So how would one allow students, located anywhere in the world, to participate in lectures delivered over this service from their own PCs?
Without audio and video in the web client, or Lync Client rights to install on any PC owned by a student (not just those owned by a University under Campus Desktop + Ent CAL) this would seem a problem.
Students or users outside the organiation can join a lync web conference as an unauthenticated user (using the attendee console)at no cost. So the attendee can join the meeting but not be a presenter. This is how we demonstrate Lync to customers and others not authenticated on our AD.
Is it possible to use mixed mode for the CAL's? SO if we had 1500 users and we wanted 200 of the to use ENT cals....how would we control this?
Do you have to have a Lync Client License for each user?
You do need a CAL, ECAL and/or Plus CAL per user to use the capabilities of Lync. The other option is to license a device CAL for a common area phone for example.
I want to have audio conferencing with multi users e.g +5 users. Should I buy one Lync 2010 and Std CAL and Ent CAL for each user? It becomes $169 per user which is too high. Consider I'm developing custom app using Lync sdk.
I am developing a custom lync client using its sdk. Do I need to purchase a client license for each deployment of my client application.
Also, I plan to provide lync server as a hosted solution to a large number of users (10000+). So do I need to purchase the enterprise license for each deployment.
Finally to enable 3+ audio conferencing (PC-PC) do we need to have enterprise voice.
This just confirms that licensing is way too complicated.
@Christopher, I don't think complicated is the right word to use. Lync licensing is just not flexible for different situations.