Exchange 2007 ActiveSync Error

Posted on 2007-11-25
Last Modified: 2012-05-05
Hello Experts,

I tring to setup my Mobile Device (Treo 680 Smartphone) to sync emails and other data from my exchange 2007 server. When i try to sync i get this error iin the device:

An error occurred during the processing of a configuration file required to service this request.

I tried to open in web browser, using the URL: https://MYSERVER/Microsoft-Server-ActiveSync              and get this error:

Server Error in '/Microsoft-Server-ActiveSync' Application.

Configuration Error
Description: An error occurred during the processing of a configuration file required to service this request. Please review the specific error details below and modify your configuration file appropriately.

Parser Error Message: Could not load file or assembly 'Microsoft.Exchange.Clients.Owa' or one of its dependencies. The system cannot find the file specified. (D:\Microsoft\Exchange\ClientAccess\Owa\web.config line 64)

Source Error:

Line 62:             <!-- OWA HTTP Modules -->
Line 63:             <httpModules>
Line 64:                   <add type="Microsoft.Exchange.Clients.Owa.Core.OwaModule, Microsoft.Exchange.Clients.Owa"
Line 65:                         name="OwaModule"/>
Line 66:             </httpModules>

Source File: D:\Microsoft\Exchange\ClientAccess\Owa\web.config    Line: 64

Version Information: Microsoft .NET Framework Version:2.0.50727.832; ASP.NET Version:2.0.50727.832

In The Event Log:

Event code: 3008
Event message: A configuration error has occurred.
Event time: 11/25/2007 5:23:03 PM
Event time (UTC): 11/25/2007 8:23:03 PM
Event ID: fa9b16d30ac64e81af70dc63d64bfec9
Event sequence: 5
Event occurrence: 4
Event detail code: 0
Application information:
    Application domain: /LM/W3SVC/1/ROOT/Microsoft-Server-ActiveSync-1-128404817158279157
    Trust level: Full
    Application Virtual Path: /Microsoft-Server-ActiveSync
    Application Path: D:\Microsoft\Exchange\ClientAccess\sync\
    Machine name: XXXXXXX-EMAIL-1
Process information:
    Process ID: 3916
    Process name: w3wp.exe
    Account name: NT AUTHORITY\SYSTEM
Exception information:
    Exception type: ConfigurationErrorsException
    Exception message: Could not load file or assembly 'Microsoft.Exchange.Clients.Owa' or one of its dependencies. The system cannot find the file specified. (D:\Microsoft\Exchange\ClientAccess\Owa\web.config line 64) (D:\Microsoft\Exchange\ClientAccess\Owa\web.config line 64)
Request information:
    Request URL: 
    Request path: /Microsoft-Server-ActiveSync
    User host address:
    Is authenticated: False
    Authentication Type:  
    Thread account name: NT AUTHORITY\SYSTEM
Thread information:
    Thread ID: 5
    Thread account name: NT AUTHORITY\SYSTEM
    Is impersonating: False
    Stack trace:    at System.Web.Configuration.HttpModuleAction.get_Entry()
   at System.Web.Configuration.HttpModulesSection.CreateModules()
   at System.Web.HttpApplication.InitInternal(HttpContext context, HttpApplicationState state, MethodInfo[] handlers)
   at System.Web.HttpApplicationFactory.GetNormalApplicationInstance(HttpContext context)
   at System.Web.HttpApplicationFactory.GetApplicationInstance(HttpContext context)
   at System.Web.HttpRuntime.ProcessRequestInternal(HttpWorkerRequest wr)
Custom event details:

For more information, see Help and Support Center at


Relevanto Info:

Owa Works Fine
I have Aspnet enabled is IIS
I have a trusted and valid SSL certificate in IIS

Any Clues ?

Question by:tullioc
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Expert Comment

ID: 20346965
Is this server a CAS role server?

Author Comment

ID: 20347683
Only one server, all roles

Accepted Solution

Oblikon earned 500 total points
ID: 20486777
I was having the exact same problem as above.  The only way to resolve it was to reinstall the CAS, which was a pain, but it is working perfectly now.

Expert Comment

ID: 22710931
You can also remove the directory:

C:\WINDOWS\Microsoft.NET\Framework64\v2.0.50727\Temporary ASP.NET Files\microsoft-server-activesync

You must stop the application pool before. That solved the problem for me.

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