Quick Tip: Lync Web App launches instead of Lync Client

Scenario: User clicks on a Join Lync Meeting link from Outlook and the default browser launches but leaves the user within the Lync Web App, instead of launching the full Lync client.

Issue: Within the Windows OS there should be a file extension association for .ocsmeet that is tied back to the Lync (Desktop) or Lync (Windows Store) application.

Resolution: You can fix this by either reinstalling the full client or simply importing in the registry keys needed for this file extension association.  There are three places the file extension association is listed:

Current User Software – Download

Windows Registry Editor Version 5.00

[HKEY_CURRENT_USER\Software\Classes\ocsmeet_auto_file]

[HKEY_CURRENT_USER\Software\Classes\ocsmeet_auto_file\shell]

[HKEY_CURRENT_USER\Software\Classes\ocsmeet_auto_file\shell\edit]

[HKEY_CURRENT_USER\Software\Classes\ocsmeet_auto_file\shell\edit\command]
@=”\”C:\\Program Files (x86)\\Microsoft Office\\Office15\\Lync.exe\” \”%1\””

[HKEY_CURRENT_USER\Software\Classes\ocsmeet_auto_file\shell\open]

[HKEY_CURRENT_USER\Software\Classes\ocsmeet_auto_file\shell\open\command]
@=”\”C:\\Program Files (x86)\\Microsoft Office\\Office15\\Lync.exe\” \”%1\””

Classes Root – Download

Windows Registry Editor Version 5.00

[HKEY_CLASSES_ROOT\ocsmeet_auto_file]

[HKEY_CLASSES_ROOT\ocsmeet_auto_file\shell]

[HKEY_CLASSES_ROOT\ocsmeet_auto_file\shell\edit]

[HKEY_CLASSES_ROOT\ocsmeet_auto_file\shell\edit\command]
@=”\”C:\\Program Files (x86)\\Microsoft Office\\Office15\\Lync.exe\” \”%1\””

[HKEY_CLASSES_ROOT\ocsmeet_auto_file\shell\open]

[HKEY_CLASSES_ROOT\ocsmeet_auto_file\shell\open\command]
@=”\”C:\\Program Files (x86)\\Microsoft Office\\Office15\\Lync.exe\” \”%1\””

Current User – Download

Windows Registry Editor Version 5.00

[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.ocsmeet]

[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.ocsmeet\OpenWithList]
“MRUList”=”a”
“a”=”Lync.exe”

[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.ocsmeet\OpenWithProgids]
“ocsmeet_auto_file”=hex:00

[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.ocsmeet\UserChoice]
“Progid”=”ocsmeet_auto_file”

13 thoughts on “Quick Tip: Lync Web App launches instead of Lync Client

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  • February 26, 2014 at 6:20 pm
    Permalink

    Excellent info. Just curious if you had notes on the reverse setup. If the Client is installed but we are not ready to use the client and only want to use the web app. We installed the client our new machines so they will be ready when we put up a lync server but now the client always fires instead of the web client. Can we accomplish that by adjusting these registry keys?

    Reply
    • March 1, 2014 at 4:30 am
      Permalink

      Delete the ones listed and you should be good. If they are missing, than all you get is the web.

      Reply
  • February 2, 2015 at 2:47 pm
    Permalink

    Hi

    The files you have for the registry fix don’t appear to be available for download any more.

    Cheers

    Phil

    Reply
  • March 29, 2015 at 4:23 pm
    Permalink

    Such a shame that the links are dead, this sounds like just the solution to our issue

    Reply
    • March 31, 2015 at 6:05 pm
      Permalink

      I’ve updated the post. Got lost when I migrated the site.

      Reply
      • April 1, 2015 at 9:34 am
        Permalink

        Thanks a bunch! It really did work 🙂

        Reply
  • April 19, 2015 at 8:05 am
    Permalink

    does this solution work with Windows 7 , and Lync 2010 ?

    Reply
  • January 22, 2016 at 10:01 pm
    Permalink

    Trying this solution.
    Will let you know if it works.

    Reply
  • March 11, 2016 at 12:46 pm
    Permalink

    Same issue on iOS (iPhone) with the mobile app. It quickly displayed a popup and we must click on OPEN in less than 1 second otherwise it opens the webapp. Any solution to automatically start the installed app instead of having to quickly push on OPEN?

    Reply
  • December 22, 2016 at 1:39 pm
    Permalink

    I am having the problem described here, but my Office and Lync version is 2010. Can you provide the reg files for this version? (What you provided above appears to be for Office 2013.)

    Thank you!

    Robert

    Reply
  • December 15, 2017 at 3:14 pm
    Permalink

    Since the links are dead, it would be great if you could just post reg keys that need to be edited in plain text.

    Reply

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