Update: Microsoft Lync Server 2010 Protocol Workloads Poster

The Microsoft Lync Server 2010 communications software protocol workloads poster shows the protocols that are used by each workload in Lync Server 2010, describing relationships, dependencies, the servers that initiate connections, and certificate requirements. This poster provides a snapshot of the network connections between server roles. You can download this poster from hereThe latest update is version 5.12. This version adds details to the Enterprise Voice workload quadrant based on feedback from Lync experts.

NOTE   Microsoft Lync Server 2010 Protocol Workloads Poster version 5.15 is now available here.

Author: Rui Maximo

Publication date: November 2010

Revision date: June 6, 2012

Product version: Microsoft Lync Server 2010


The Microsoft Lync Server 2010 Protocol Workloads Poster is an update of the Office Communications Server 2007 R2 protocol poster, which was released in 2009 and is still available. So many customers and professionals liked it and found it useful that they requested I update it for Lync Server 2010. Encouraged by the positive feedback, I made it a priority to release an updated poster for Lync Server.

Since the initial release early the week of November 15, 2010, customers and UC professionals sent in e-mails with positive comments and valuable feedback regarding inaccuracies and enhancements. Providing accurate information is important—every effort is made to quickly update the poster so that erroneous information isn’t disseminated.

To help you track the latest update of the poster, you’ll notice a version number in the upper-left corner of the poster. The current and latest update is marked as version 5.12. This version updates adds more detailed traffic information to the Enterprise Voice workload based on feedback from Richard Pasztor and Thomas Binder.

As the “guardian” of this poster, I’m committed to keeping the poster updated. You can download the poster from here. Hope you like it!

View this poster at Zoom.IT.


Isn't eye-candy enough to serve as a purpose? You can print it and hang it in your office. Co-workers passing by will immediately be impressed by your technical prowess, and your manager will suddenly, to your surprise, give you a raise. We've heard customer stories reporting unexpected good luck coming their way. So, go ahead and plaster this protocol poster on your wall, and let the goodwill shower down on you.

In addition to good fortune, this poster provides an understanding of the protocols and ports used for each workload. By isolating the protocols for each media, you can gain a better understanding of how Lync Server works. This deeper understanding can help you troubleshoot problems with a specific media in your Lync Server deployment.

Because certificate configuration can be confusing, this poster also details which settings to define in the server certificate request. If you don't find these settings defined in the certificate issued, it is an indication that the server certificate wasn't properly requested from the certification authority (CA).

Domain Name System (DNS) is a configuration step that can often be missed and is prone to misconfiguration, particularly for Edge servers. The poster lists the DNS configurations that are needed for Lync Server.

Last, but not least, this poster has useful links to where you can obtain additional resources, such as articles, the Microsoft Office Communications Server 2007 R2 Resource Kit book, product documentation, and useful tools. You'll notice a Microsoft Tag. Take a picture with your mobile phone, and the picture will automatically resolve the embedded URL to NextHop. Here you'll find lots of useful technical articles and a community of like-minded technical professionals, such as yourself. The Microsoft Tag application must be installed on your phone. If you're not familiar with Microsoft Tag, you can get more information at http://microsoft.com/tag.


The Microsoft Lync Server 2010 Protocol Workloads Poster summarizes the protocols, ports, and certificate and DNS requirements for each workload in Lync Server. Having a visual snapshot of how the product works can be useful. If you would like to provide feedback, you can reach me at rui@maximo.ws.

Stay tuned for Microsoft Lync Server 2010 Firewall Poster to be released. I've heard that many customers (that's you, yes, you) would like to have it. Please check back on NextHop or follow DrRez on Twitter for an announcement of when it will be published.

Lync Server 2010 Resources

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Keywords: Enterprise Voice; IM; presence; conferencing; application sharing; CAC; certificate; central management store; Edge Server; Mediation Server; Exchange UM; Mobility Server; Monitoring Server; Group Chat Server; Director; XMPP gateway; sip; rtp; srtp; stun; turn; psom; https; mtls; tls; dns;

Comments (28)
  1. mark.thomas@axa-tech.com says:

    I would also like to see a Lync Online/Office 365 version of this poster when using both Lync 2010 and 2013 clients.

  2. Rob L. says:

    Looking the latest version 5.15 for Lync 2010, the A/V and Web Conferencing Workload shows ICE between Lync clients. I have not seen any other info that indicates Lync clients do ICE between them.

    Also on the Enterprise Voice workload there needs to be a separate SRTP line from the SRTP, ICE line. Front End pool, Mediation Pool, and Exchange UM don't accept ICE, then send it to the edge pool. The SRTP to Exchange UM is there, but the is no indication SRTP to Front End pool or Mediation Pool for if media bypass is not used.

  3. Rob L. says:

    Also, Exchange UM needs 5062 access to Edge Pool for MRAS.

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