The IIS serves several features and functions along with Lync, as listed below:

  • Enable users to download files from the Address Book Service
  • Enable clients to obtain updates
  • Enable conferencing
  • Enable users to download meeting content
  • Enable users to expand distribution groups
  • Enable phone conferencing
  • Enable response group features

In addition, the cumulative update for Lync Server 2010: November 2011 installer - http://technet.microsoft.com/en-us/library/hh689988(v=ocs.14).aspx – creates virtual directories in IIS for the following purposes:

  • On Front End Servers or Standard Edition Servers: support mobility functionality, such as Instant Messaging (IM) and presence on mobile devices
  • On Front End Servers or Standard Edition Servers and on Directors: enable mobile devices to automatically discover mobility resources

In the table below, some of the most common services are addressed and described:

Lync Web Service

Address

Description

Address Book Server

https://<InternalFQDN>/ABS/int/Handler

Location of Address Book Server downloaded files for internal users

Autodiscover Service

https://<InternalFQDN>/Autodiscover

Location of the Lync Server Autodiscover Service that locates mobility resources for internal mobile users

Client updates

http://<InternalFQDN>/Autodiscover

Location of update files for internal computer-based clients

Conf

http://<InternalFQDN>/AutoUpdate/Int

Location of update files for internal computer-based clients

Device updates

http://<InternalFQDN>/Conf/Int

Location of conferencing resources for internal users

Meeting

http://<InternalFQDN>/etc/place/null

Location of meeting content for internal users

Mobility Service

http://<InternalFQDN>/Mcx

Location of Mobility Service resources for internal mobile device users

Group Expansion and Address Book Web Query Service

http://<InternalFQDN>/

GroupExpansion/int/service.asmx

Location of the Web Service that enables group expansion for internal users. Also, the location of the Address Book Web Query service that provides global address list information to internal Mobile Microsoft Lync 2010 clients.

Phone Conferencing

http://<InternalFQDN>/PhoneConferencing/Int

Location of phone conferencing data for internal users

Device updates

http://<InternalFQDN>/RequestHandler

Location of the Device Update Web Service Request Handler that enables internal Unified Communication devices to upload logs and check for updates

Response Group application

http://<InternalFQDN>/RgsConfig

http://<InternalFQDN>/RgsClients

Location of Response Group Configuration