The Microsoft.Office.SecureStoreService.dll file installed by SharePoint Server 2010 cannot be found in the "Microsoft Shared\Web Server Extensions\14\ISAPI" folder

SYMPTOMS
You write a code that references the Microsoft.Office.SecureStoreService.dll file. This file should be located in the following folder on the server that is running Microsoft SharePoint Server 2010:
Program Files\Common Files\Microsoft Shared\Web Server Extensions\14\ISAPI

However, the file cannot be found when you try to reference it.
WORKAROUND
To work around this issue, you can obtain the Microsoft.Office.SecureStoreService.dll file from the Global Assembly Cache (GAC).

To do this, follow these steps:
  1. At a command prompt, locate the following folder:
    drive:\Windows\assembly\GAC_MSIL\Microsoft.Office.SecureStoreService\14.0.0.0__71e9bce111e9429c>
    Note The drive placeholder is the drive where your Windows operating system is installed on the server.
  2. Copy the Microsoft.Office.SecureStoreService.dll file to the required location, and then reference it.
MORE INFORMATION
GAC is the Microsoft .NET Framework Global Assembly Cache. This is a computer-wide code cache that stores assemblies. These assemblies are specifically installed on the computer to be shared by many applications.
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Article ID: 982263 - Last Review: 10/06/2011 13:32:00 - Revision: 4.0

Microsoft SharePoint Server 2010

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