You may encounter a “HTTP error status 500” error connecting to Exchange Server 2010 with either the Exchange Management Console or the Exchange Management Shell.  The full error message is:

Connecting to remote server failed with the following error message : The WinRM client
received an HTTP server error status (500), but the remote service did not include any other information about the cause of the failure. For more information, see the about_Remote_Troubleshooting Help topic.
+ CategoryInfo : OpenError: (System.Manageme….RemoteRunspace:RemoteRunspace) [], PSRemotingTransportException
+ FullyQualifiedErrorId : PSSessionOpenFailed

The System event log may contain the following event details corresponding to the connection attempt:

Log Name: System
Source: Microsoft-Windows-WinRM
Date: 12/08/2010 4:45:48 PM
Event ID: 10113
Task Category: None
Level: Warning
Keywords: Classic
User: N/A
Computer: SERVER
Request processing failed because the WinRM service cannot load data or event source: DLL=”%ExchangeInstallPath%BinMicrosoft.Exchange.AuthorizationPlugin.dll”

User Action
Please check if “%ExchangeInstallPath%BinMicrosoft.Exchange.AuthorizationPlugin.dll” exists.

Additional Data
Loading %ExchangeInstallPath%BinMicrosoft.Exchange.AuthorizationPlugin.dll failed with error=”126″ (%%126).

This can occur when the Exchange server does not have an %ExchangeInstallPath% system variable set.  To resolve the error manually add the missing system variable.

Exchange 2010 Management Tools Fail to Connect with HTTP Error Status 500

Make sure you include the trailing backslash in the path.

After adding the system variable restart the server.  You should now be able to connect to the Exchange server with the management tools.

About the Author

Paul Cunningham

Paul is a former Microsoft MVP for Office Apps and Services. He works as a consultant, writer, and trainer specializing in Office 365 and Exchange Server. Paul no longer writes for


  1. Thomas Stensitzki

    Thanks. Still something that occurs These days.

  2. Nashim

    %ExchangeInstallPath% alrady exist. …

  3. Montse B

    Hi, I have this error when open EMC and I check the ExchangeInstallPath and there is in the server, also I reinstall de WINRMIIS Extenssion (reboot the Server), the Kerbauth in IIS is in mode Native and points to c:ProgramFilesMicrosoftExchange ServerV14BinKerbauth.dll, The Wsman is in mode Native and points to C:WindowsSystem32wsmsvc.dll

    in the archive “C:WindowsSystem32inetsrvconfigapplicationHost.config” I added the missing line

    Below the

    And the error persists, any other ideas?

    Please helpme¡¡¡

  4. mohsin

    i was also facing the above error “Exchange 2010 Management Tools Fail to Connect with HTTP Error Status 500” so i checked in my event log and than services.msc about dcom service and rpc service it was greyed out,
    than after making administrator full access permission changes in registry(in HKLM>appid>61738644f196-11d-0-9953-00c04fd919c1) i restarted the exchange serevr and found its working.

  5. Aneesh Mathew

    Thanks a lot…******Make sure you include the trailing backslash in the path******…I waisted a full day without the backslash..Now working perfectly.

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