Saturday, January 29, 2011

Lync 2010 NTLM Client Authentication Mismatch

I ran into a problem with NTLM Client Authentication Mismatch after I upgraded my Edge and Director to Lync Server 2010 from OCS 2007 R2. 
On my Lync Director I found the following error message in Snooper
TL_WARN(TF_DIAG) [0]06B8.0B20::01/29/2011-06:08:46.375.00018ce0 (SIPStack,SIPAdminLog::TraceDiagRecord:SIPAdminLog.cpp(145))$$begin_record
LogType: diagnostic
Severity: warning
Text: There is a mismatch between NTLM security settings on client and server computers.
Result-Code: 0xc3e93ee4 SIP_E_AUTH_NTLMMISMATCH
SIP-Start-Line: REGISTER SIP/2.0
SIP-Call-ID: 09774c9042d54469a7af4818e6364f95
A quick search of the net I found an article on Tin Cips and String blog that gave the key to solving the problem. Turns out the problem has more to do with the Operating System rather than Lync Server 2010.
I had to spend a little bit of time hunting for the group policy that the blog and technet article referenced. Here is where I found the group policy.
Default Domain Policy -> Computer Configuration -> Windows Settings -> Security Settings -> Local Policies -> Security Options -> Network security: Minumum session security for NTLM SSP based (including secure RPC) clients
Default Domain Policy -> Computer Configuration -> Windows Settings -> Security Settings -> Local Policies -> Security Options -> Network security: Minumum session security for NTLM SSP based (including secure RPC) servers
I changed the Default Domain Policy from Not Configured to Configured with the "Require 128-bit encryption" unchecked.

Wednesday, January 26, 2011

Plantronics new Calisto 800 series and Voyager PRO UC

I have been deeply involved with Unified Communications since 2003 and there is ultimately only one thing that can make or break a deployment.

The users experience.

Along with having a well-designed user interface, the audio device and quality of the call should be of utmost concern. If the user has consistently bad calls and problems configuring and using an audio device, then it makes no difference how great the rest of the features are. I've also found that users who have bad experiences remember those bad experiences for a very long time.

Today, Plantronics has announced some products that have some features that promise to improve the user experience and in some cases make using an audio device nearly effortless.

Calisto 800 Series

All three of the Calisto 800 series speakerphones blur the line between home, mobile, and office communications. There are options to connect to a PC, mobile phone, and even a standard analog line. A headset can be connected corded or cordless with Bluetooth.

Along with the usual features of full-duplex, HD audio, Plantronics has added an intuitive visual display that allows a user to control many aspects of the call from the speakerphone.

Users also have the option to use a wireless lapel microphone that gives the ability to move around freely.

How many times has someone done some white boarding and people on a speakerphone have a hard time hearing what is being said?

How many executives like to walk around their office while discussing their next big strategy to take over the world, but don't want to be bothered with a headset?

Voyager PRO UC Headset

Plantronics is trying to make using a wireless headset completely painless and they just might have succeeded.

They have now included smart sensor technology to detect when the user is actually wearing the headset.

Now, I thought with the release of the Lync client and the crazy simple ability to switch between devices was pure genius. But now, Plantronics even does the devices switching for you as you place the headset on your ear or if it is not on your ear it will send the call to your phone.


I can't tell you how many times I've answered a call and forgot that the last time I made a call I was using a headset. All of a sudden, I'm hunting around for the call window so I can switch my device back to my desk phone.

This headset will even set your presence in Lync to busy if you have answered a call from your mobile phone using the headset.


I simply can't wait to get my hands on a new Calisto speakerphone and Voyager PRO UC.

Tuesday, January 25, 2011

Wednesday, January 19, 2011

How to replicate Remote Call Control (RCC) in a pure Lync environment

This morning I came across the article of how to "convert" RCC from OCS 2007 to Lync Server 2010.

Although you can indeed enable RCC on Lync, it still blows my mind as to how many pieces there are to this solution and how complex it is to troubleshoot.

I understand the desire to utilize an existing PBX investment. After all I used to work for a PBX manufacturer. For some customers they may be required to keep the PBX for tax reasons.

But, for those that just simply do not want to let go of their phone because they like how a real phone feels, I have an alternative that is a pure OCS/Lync solution...
Are you ready for this?

A USB cable

That's right… A USB cable.
When Enterprise Voice is enabled on OCS/Lync there is an option to deploy an IP Phone or USB audio device. Both options, when connected with a USB port on your PC, automatically are detected and start to behave like an RCC solution.

You can make a call from your PC or your phone and if you put a call on hold using your phone you can pick up using your PC. Same goes for mute and anything else the phone can do. The PC client can even sign in the IP phone for you, saving you from that annoying LCD touch screen.

It is seamless, and easy.

Because it is so easy, I think a case could be made to justify the replacement of the PBX phones just in the cost of installing and maintaining RCC.

Total Cost of Ownership is a big deal with RCC because it either costs a lot to hire a professional that can understand both telephony and data, or you have a to pay a systems integrator that understands both telephony and data.

I have done a lot of RCC systems and none of them have gone smoothly. There is always some little issue that takes an enormous effort to resolve.
Nortel/Avaya Converged Office for the CS 1000 was probably the best solution for RCC, but once a customer had it installed they were disappointed by the lack of some features in OCS that a pure Enterprise Voice client would have (Simultaneous Ring for example)

With a USB cable, you have all the OCS/Lync features available and you can control a real phone on the desk. If it is an IP phone, then when the PC is gone or shutdown it will still operate as a stand-alone phone just like the PBX phone did.

So what do you say? Weeks and possibly months of troubleshooting or a USB cable.

Feel free to contact me (at jmckinney at if you would like to talk more about this solution or to setup a demo so you can experience what this solution looks like.