How to Determine What Version of LCS or OCS You Have Installed

Here's an easy way to figure out exactly what version of LCS or OCS you have installed.

For LCS or OCS, check the following key:
HKLM\Software\Microsoft\Real-Time Communications\{92AC8981-AAD9-4391-8563-92E558EEF4C6}

For OCS 2007 R2, check the following key:
HKLM\Software\Microsoft\Real-Time Communications\{A593FD00-64F1-4288-A6F4-E699ED9DCA35}

Possible Values:

SE - Standard Edition
EE - Enterprise Edition

Volume - Volume License Edition
Eval - Evaluation Edition
MSDN - MSDN Edition

2.0.5369.0 - Live Communications Server 2005 RTM
2.0.5470.0 - Live Communications Server 2005 SP1
3.0.6362.0 - Office Communications Server 2007 RTM
3.5.6907.0 - Office Communications Server 2007 R2 RTM


Comments (6)
  1. dodeitte says:

    @Jose Luis

    Depending on what you're looking for (HKLMSOFTWAREMicrosoftReal-Time Communications) and its subkeys will provide some of the same information.

  2. hussein K says:

    thanks alot this saved my day 🙂

  3. greg j says:

    Very helpful indeed — pity this isn't easy to find elsewhere.

  4. Franco says:

    Excelent !!!


  5. Jose Luis says:

    Do you know somethng similar for Lync 2010?

  6. Hari Teja says:

    Thanks a lot for the information !!

Comments are closed.

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