Microsoft Skype for Business StyleBook

Last published : Sep 21, 2026
The Skype for Business 2015 application relies on several external components to function. The Skype for Business network consists of various systems, such as servers and their operating systems, databases, authentication and authorizing systems, networking systems and infrastructure,and telephone PBX systems. Skype for Business Server 2015 is available in two versions, Standard Edition and Enterprise Edition. The primary difference is in support for high-availability features that are only included in the Enterprise Edition. To implement high availability, multiple Front-End servers must be deployed to a pool and SQL servers must be mirrored.
An Enterprise Edition deployment enables the creation of multiple servers with different roles.
Related information

Primary components

The primary components in Skype for Business 2015 application are:
  • Front-end servers
  • Edge servers
  • Director servers
  • Database (SQL) servers

Front-end servers

In the Skype for Business application, the Front-End server is the core server in your network. It provides the links and services for user authentication, registration, presence, address book, A/V conferencing, application sharing, instant messaging, and web conferencing. If you are deploying Skype for Business 2015 Enterprise edition, the topology typically consists of at least two Front-End servers load balanced in a Front-End pool with a database server that hosts the SQL Server instance holding the Skype for Business database.

Edge servers

Deploying Edge servers for Skype for Business is necessary if external users who are not logged into your organization's internal network need to be able to interact with internal users. These external users could be authenticated and anonymous remote users, federated partners, or other mobile clients.
There are four types of roles in Skype For Business Edge server:
  • Access Edge, which handles SIP Traffic and authenticates external connections, allows remote connection and allows federation Connection
  • Web Conferencing, which handles Data Conferencing Packets, and allows external users to access Skype for Business
  • A/V Conferencing, which handles A/V Conferencing Packets, and extends audio and video, app sharing and file transfer to external users
  • XMPP Proxy, which handles XMPP packets, and allows XMPP based servers or clients to connect to Skype for Business.

Director servers

The main function of the Director server in Skype for Business 2015 is to authenticate endpoints and "direct" the users to the pool that contains their account. In Skype for Business 2015, though the Director is a completely dedicated and specific role on a standalone server, it is an optional server. This facilitates security by making it easier to deploy or remove the configurations.
Directors are most useful where multiple pools exist because they provide a single point of contact for authenticating endpoints. Also, for remote users, a Director serves as an extra hop between the Edge pool and Front-End pool, adding an extra layer of protection against attacks.
The following figure diagrammatically represents the deployment of Skype servers in the network:
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Configuring NetScaler instances in an enterprise

The following table lists the IP addresses used in the sample configuration included in the instructions below:
Skype for Business Servers Virtual IP Address Server IP Addresses NetScaler Instance
Edge Servers External VIP - 192.20.20.20 192.20.20.21; 192.20.20.22 10.102.29.141
Internal VIP - 10.10.10.20 10.10.10.21; 10.10.10.22
Front-end Servers 10.10.10.10 10.10.10.11; 10.10.10.12 10.102.29.60
Director Server 10.10.10.30 10.10.10.31; 10.10.10.32 10.102.29.93

To configure front-end servers

  1. In NetScaler Console, navigate to Applications > Configuration, and click Create New. The Choose StyleBook page displays all the StyleBooks available for your use in NetScaler Console. Scroll down and select Microsoft Skype for Business 2015 StyleBook. The StyleBook opens as a user interface page on which you can enter the values for all the parameters defined in this StyleBook.
  2. In the Edge Server section, enter the following virtual IP (VIP) addresses and IP addresses of all the Edge servers in the network.
    1. External VIP address and IP addresses for the Edge servers that will be used for Access Edge, web conferencing Edge, and A/V Edge.
    2. Internal VIP address and IP addresses for the Edge servers that will be connected to the internal network.
    3. Two external and two internal Edge servers in your network.
  3. In the Front-End Server section, enter the IP address of the virtual Front-End server (VIP) that is to be created for the Skype for Business Front-End servers. Also, enter the IP addresses of all the Skype for Business Front-End servers in the network.
  4. In the Director Server section, enter the virtual IP address (VIP) for the Director servers that is to be created for the Skype for Business application. Also, enter the IP addresses for all the Skype for Business Director servers in the network. Create at least two Director servers for high-availability.
  5. The Advanced Settings section lists all the default ports configured on the NetScaler instances for the three Skype servers.
The following table provides you a list of all default ports and protocols:
Label Port Protocol Description
HTTP Port 80 HTTP Used for communication from Front-End Servers to the web farm FQDNs when HTTPS is not used.
HTTPS Port 443 HTTPS Used for communication from Front-End Servers to the web farm FQDNs.
AutoDiscover Internal Port 4443 HTTPS HTTPS (from Reverse Proxy) and HTTPS Front-End inter-pool communications for AutoDiscover sign-in.
RPC Port 135 DCOM and remote procedure call (RPC) Used for DCOM based operations such as moving users, user replicator synchronization, and address book synchronization.
SIP Port 5061 TCP (TLS) Used by Front-End servers for all internal SIP communications.
SIP Focus Port 444 HTTPS, TCP Used for HTTPS communication between the Focus (the component that manages the Skype conference state) and the individual servers.
SIP Group Port 5071 TCP Used for incoming SIP requests for the response group application.
SIP AppSharing Port 5065 TCP Used for incoming SIP listening requests for application sharing.
SIP Attendant Port 5072 TCP Used for incoming SIP requests for the attendant (that is, for dial-in conferencing).
SIP Conf Announcement Port 5073 TCP Used for incoming SIP requests for the Skype for Business server conferencing announcement service (that is, for dial-in conferencing).
SIP CallPark Port 5075 TCP Used for incoming SIP requests for the CallPark application.
SIP Call Admission Port 448 TCP Used for call admission control by the Skype for Business server bandwidth policy service.
SIP Call Admission TURN Port 5080 TCP Used for call admission control by the bandwidth policy service for Audio/Video Edge TURN traffic.
SIP Audio Test Port 5076 TCP Used for incoming SIP requests for the audio test service.
HTTPS External Port 443 HTTPS Used for external ports for SIP/ TLS communication for remote user access, accessing internal Web conferences, and STUN/TCP inbound and outbound media communications for accessing internal media and A/V sessions.
HTTPS Internal Port 443 HTTPS Used for internal ports for SIP/ TLS communication for remote user access, accessing internal Web conferences, and STUN/TCP inbound and outbound media communications for accessing internal media and A/V sessions.
SIP External Remote Access Port 5061 TCP Used for external ports for SIP/MTLS communication for remote user access or federation.
SIP Internal Remote Access Port 5061 TCP Used for internal ports for SIP/MTLS communication for remote user access or federation.
SIP External STUN UDP Port 3478 UDP Used for external ports for STUN/ UDP inbound and outbound media communications.
SIP Internal STUN UDP Port 3478 UDP Used for internal ports for STUN/UDP inbound and outbound media communications.
SIP Internal IM Port 5062 Used for internal ports for SIP/MTLS authentication of IM communications flowing outbound through the internal firewall.
HTTP Port 80 TCP Used for initial communication from Directors to the web farm FQDNs.
HTTPS Port 443 HTTPS Used for communication from Directors to the web farm FQDNs.
AutoDiscover Internal Port 4443 HTTPS Used for HTTPS (from Reverse Proxy) and HTTPS Director inter-pool communications for AutoDiscover sign-in.
SIP Internal Port 5061 TCP Used for internal communications between servers and for client connections.
       6.  In the Target Instances section, select the three different NetScaler instance on which to deploy the three Skype for Business servers.
Note
You can also click the refresh icon to add recently discovered NetScaler instances in NetScaler Console to the available list of instances in this window.
 7.  Click Create to create the configuration on the selected NetScaler instances.
Tip
We recommend you select Dry Run to check the configuration objects that must be created on the target instance before you execute the actual configuration on the instance.
When the configuration is successfully created, the StyleBook creates 25 load balancing virtual servers. That is, for each port, one load balancing virtual server is defined along with one service group, and the service group is bound to the load balancing virtual server. The configuration also adds the Front-End servers as service group members and binds them to the service group. The number of service group members created is equal to the number of Front-End servers created.
The following figure shows the objects created in each server:
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