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Remote Desktop Issue Windows XP - Authentication Error has occured (0X507)

AN Authentication Error has occured (0X507)

This error occurs when you try to connect from your XP (SP 2 or 3) desktop to Windows 2008 or Windows 2012 Remote Desktop Server.

To solve this error you need to make registry changes. 

  1. Click on Start and Click on RUN (if it is Vista or later type regedit in search)
  2. Type Regedit and click OK
  3. It will open registory editor
  4. Click on HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa
  5. In right hand panel right click on Security Packages and clcik Modify.
  6. In box leave all value and add tspkg at end As new value. and click OK.Refer Image
  7. Now click onHKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecurityProviders
  8. In right hand side panel right click on Security Provider and click Modify
  9. In data add word credssp.dll as new value. Do not change any other value
  10. Click OK and exit from registery Editor
  11. Restart your computer.
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  • Avatar
    vinu raveendran

    Perfect solution...

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