I was able to successfully develop and test a BDC model developed in visual studio 2010. It was developed on a server using SharePoint Server 2010. I tried deploying the solution to our SharePoint Foundation 2010 Farm and receive an error stating that Microsoft.Office.SharePoint.ClientExtensions cannot be found.

I installed the dll in GAC of all the web front end servers and the Microsoft.Office.Server dll. even after restarting the timer services and resetting IIS I still receive the same error. I even copied the DLL in the SharePoint ISAPI folder. I don't understand how to get this deployed. I found a workaround on the internet but the custom code download page returns a 404 so I can't implement the solution.

3 Answers 3


There are 4 files you have to copy to ISAPI folder and 2 dll register to the GAC.

In order to cross off this problem, some files of SharePoint Server 2010 need to be copied, which can be found in the directory 14\ISAPI:

  • microsoft.office.sharepoint.clientextensions.dll
  • Microsoft.Office.Sharepoint.ClientExtensions.xml
  • Microsoft.Office.Server.dll
  • Microsoft.Office.Server.xml

Register the DLLs in the GAC to fix it, just copying them to the directory C:\Windows\assembly.

Reopen the Visual Studio 2010 and deploy your BDC Model Solution successfully!


other option is. you will need to write a Feature Event Receiver to enable the deployment of BDC models from within Visual Studio 2010


  • I ended up installing Search Server Express and it worked perfectly. I tried the above steps with no success. Commented Jun 17, 2014 at 12:30

I faced the same problem, but couldn't install Search Server Express (won't install on Windows 7) nor could I install SharePoint 2010 (not Foundation) to copy the required DLLs.

OS: Windows 7 Professional  
VS: Visual Studio Professional 2013  
SP: SharePoint Foundation 2010

My steps to get this working:

  1. Download Search Server Express
  2. Extract: SearchServerExpress_SP2_en-us.exe /extract:c:\downloads\SearchServerExpress_SP2_en-us
  3. In the Search Server Express extracted folder, browse to /Global/Shared/osrv.cab, extract "MICROSOFT.OFFICE.SERVER.DLL" and "MICROSOFT.OFFICE.SERVER.XML"
  4. In the Search Server Express extracted folder, browse to /Global/Search/osrchwfe.cab, extract "MICROSOFT.OFFICE.SHAREPOINT.CLIENTEXTENSIONS.XML"
  5. Download "microsoft.office.sharepoint.clientextensions.dll" from github
  6. Open visual studio developer command prompt as administrator, cd to folder with the above DLLs, run gacutil -i [file].dll to add DLLs to GAC
  7. Restart Visual Studio as administrator, build and deploy

Installed an another win7 machine and had to change HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Shared Tools\Web Server Extensions\14.0\WSS\ServerRole from SINGLESERVER to APPLICATION as per this post

  • This was a life saver
    – Erin L
    Commented Jan 15, 2016 at 16:40

If you install Microsoft Search Server Express it will provide all the necessary assemblies required to deploy BDC models to SharePoint. I tried and tested this solution.

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