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Microsoft Exchange Server 2010 SP2 - Getting Event ID: 2280 / exppw.dll Failed to Load

Issue
Getting below event on Application log,
Log Name:      Application  Source:        Microsoft-Windows-IIS-W3SVC-WP  Date:          Date and TimeEvent ID:      2280  Task Category: None  Level:         Error  Keywords:      Classic  User:          N/A  Computer:      ComputerNameDescription:  The Module DLL C:\Program Files\Microsoft\Exchange Server\V14\ClientAccess\Owa\auth\exppw.dll failed to load.  The data is the error.
Assume that Exchange is intalled on C: Drive.
Solution
The Module mapping to the exppw.dll file was missing from OWA Virtual Directory:
  1. Register the exppw.dll:
    1. Open IIS manager, select the server. Click Modules in the left pane.
    2. Click on Configure Native Modules > Click the button Register > Type the name as exppw.
    3. Browse and select the path of above file as: c:\Programme Files\Microsoft\Exchange Server\V14\Client Access\OWA\Auth\exppw.dll.
      (c:\ is assumed to be a default drive where Exchange is installed)
  2. Check the module in OWA virtual directory:
    1. Expand sites > Default web site > select owa.
    2. Click Modules in the left pane. Find the exppw in the modules.
    3. Make sure the module type is set to Native and entry type is local.

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Country: United States

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