Sep 21

Lync RC client and OCS 2007 R2 don’t match…. Here’s why..

In this blog, I’ll write why you don’t want to use the Lync Release Candidate client with your OCS 2007 R2 backend.

Why would you…

The Lync Client performs a server client version check. This check is set by default, but you can disable it, for example when you are writing an application to use the new Lync client. The registry key for doing that is:


LiveMeeting from the Cloud or On-premise

However…. There are some great enhancements in Outlook regarding the LiveMeeting service and your On-premise ‘LiveMeeting’ service. The on-premise version will not require the LiveMeeting software anymore… It is all in your Lync client, isn’t that great!!!

For large companies that require 1250 concurrent users in a single LiveMeeting, there is the LiveMeeting service ( That service relies on the LiveMeeting client…

In earlier times… On-premise ‘LiveMeeting’ required an Outlook Add-in… That Add-in has been removed and is now fully integrated in your Outlook client, see:

For the people that are using Outlook 2007… there is a different add-in:

And see… the Live Meeting part has changed as well… It is now mentioning Live Meeting service:

Meeting invites are changed as well:

The URL is referring to the Communicator Web Access… This will never popup the LiveMeeting or Lync client to have that Online Meeting you wanted…

So Don’t….

So don’t set the Registry key and deploy the Lync RC client, otherwise you will end up not being able to perform online on-premise meetings…

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  1. […] Vorher musste allerdings noch kurz der Schlüssel “DisableServerCheck” im Registrierungszweig HKEY_CURRENT_USERSoftwarePoliciesMicrosoftCommunicator auf 1 gesetzt werden – siehe hier. […]

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