Lync Server

Lync Server
Name	Lync Server
Developer	Microsoft
Released	2010
Latest release	2013 R2
Operating system	Microsoft Windows Server
Platform	x86, x64
Genre	Unified communications, instant messaging, VoIP

Lync Server Lync Server is a Microsoft enterprise unified communications platform that provides instant messaging, presence, conferencing, and telephony services for organizations. It integrates with Microsoft Exchange, Microsoft SharePoint, Active Directory, and Skype for Business ecosystems to deliver real-time collaboration across desktop and mobile clients. Major deployments have involved enterprises, educational institutions, and government agencies seeking consolidated voice, video, and messaging infrastructure.

Overview

Lync Server delivers presence, instant messaging, enterprise voice, conferencing, and application sharing for users in corporate environments such as Microsoft, IBM, Accenture, and Deloitte, interoperating with systems like Cisco Unified Communications Manager, Avaya Aura, and Asterisk. The product leverages standards and protocols implemented by organizations including IETF, ITU-T, and SIPforum, and has been evaluated alongside platforms from Google, Cisco, and VMware. Enterprises considering migration often assess integration with Microsoft Exchange Server, Microsoft SharePoint Server, and Active Directory Domain Services deployed in data centers operated by Equinix, Amazon Web Services, or Microsoft Azure.

Architecture and Components

The server architecture is composed of roles and services including Front End Server, Edge Server, Mediation Server, Director, and Persistent Chat, which connect to clients such as Microsoft Office, Skype for Business, and mobile apps. Back-end dependencies include SQL Server for data storage, Windows Server and Active Directory for authentication, and Exchange Server for unified messaging and calendar integration. Network elements like Session Border Controllers from AudioCodes or Ribbon, SIP trunks provided by carriers such as AT&T or BT, and gateways for PSTN interconnect are typical in production topologies. High-availability and disaster-recovery designs often use Windows Server Failover Clustering, SQL Server Always On Availability Groups, and geographically dispersed data centers in regions such as North America, EMEA, and APAC.

Deployment and Administration

Deployment models include on-premises Enterprise Edition, Standard Edition, and hybrid configurations with cloud services such as Office 365, Azure Active Directory, and Skype for Business Online. Administration tasks are performed using Lync Server Management Shell (PowerShell), Lync Server Control Panel, and System Center Operations Manager for monitoring, with automation via Microsoft Deployment Toolkit and Configuration Manager deployments at scale across campuses like Harvard University, University of Oxford, or the California State University system. Network planning draws on quality-of-service designs similar to those used by Cisco, Juniper, and HPE, while compliance and archiving integrate with solutions from Verint, ArcSight, and Symantec.

Features and Functionality

Core features include presence indicators, persistent chat, enterprise voice with call routing and hunt groups, audio/video conferencing, application and desktop sharing, and voicemail integration with Exchange Unified Messaging. Client features are exposed through Microsoft Office integration for Outlook scheduling, PowerPoint slide sharing during conferences, and OneNote collaboration in meeting contexts used by teams at General Electric, Procter & Gamble, and NASA. Media handling supports codecs and standards referenced by ITU-T and the IETF, and conferencing scales using pools and directors for large events and webinars comparable to platforms used by Bloomberg, Reuters, and Thomson Reuters.

Interoperability and Integration

Interoperability is provided via SIP, H.323 gateways, and federation with public IM networks and partners, enabling connectivity to Skype, AOL (historically), and XMPP services. Integration points include Exchange Server Unified Messaging for voicemail, SharePoint for team sites and recording storage, Active Directory for identity management, and Microsoft Office for calendar and contact synchronization. Third-party integration often involves contact center vendors like Avaya, Genesys, and NICE, and collaboration with device manufacturers such as Polycom, Yealink, and Logitech for IP phones and video endpoints.

Security and Compliance

Security mechanisms include TLS and SRTP for media and signaling encryption, mutual authentication with Active Directory Certificate Services, and perimeter Edge Server deployments for secure external access. Compliance capabilities include archiving of IM and conferencing sessions with retention policies configured via Exchange and third-party e-discovery tools from vendors like Symantec, OpenText, and Veritas. Regulatory considerations for sectors such as finance and healthcare reference frameworks and audits similar to those performed under HIPAA, PCI DSS, and SOX by compliance teams at banks like JPMorgan Chase and institutions such as the NHS.

History and Versioning

The product evolved from Office Communications Server and Microsoft Live Communications Server into releases denominated by years, with major milestones including Lync Server 2010 and Lync Server 2013, followed by rebranding to Skype for Business and later integration into Microsoft Teams initiatives. Adoption curves and migration strategies were influenced by enterprise customers including Procter & Gamble, Walmart, and Vodafone, while standards work involved participation by Microsoft in IETF and ITU-T forums. Successive versions added features for multimedia conferencing, federation, and cloud-hybrid scenarios aligned with Microsoft's broader Office 365 and Azure cloud roadmap.

Category:Microsoft server software