Windows 10: FIX: RDP ERROR THE FUNCTION REQUESTED IS NOT SUPPORTED

Discus and support FIX: RDP ERROR THE FUNCTION REQUESTED IS NOT SUPPORTED in Windows 10 Tutorials to solve the problem; When trying to connect to a server or machine via Remote Desktop Connection you will get the below error which is strange as one would normally connect... Discussion in 'Windows 10 Tutorials' started by Noel, Sep 14, 2018.

  1. Noel New Member

    FIX: RDP ERROR THE FUNCTION REQUESTED IS NOT SUPPORTED


    When trying to connect to a server or machine via Remote Desktop Connection you will get the below error which is strange as one would normally connect without any issues.

    “Remote Desktop Connection
    An authentication error has occurred.
    The function requested is not supported
    Remote computer: XXX.XXX.XXX.XXX”

    After some research I found that this is due to a Windows Update patch which was released recently that is CVE-2018-0886 for RDP. So if the workstation was updated and the server was not yet.

    There are two options for this.

    Patch the server with the CVE-2018-0886 (Recommended)

    Update the policy on the local computer (Not recommended but in case of emergency)

    On the computer open Group Policy
    Go to Computer Configuration > Administrative Templates > System > Credentials Delegation
    Change Encryption Oracle to Remedition to Enabled
    Change Protection Level to Vulnerable

    Open MSTSC and you will be able to connect to the server.



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  2. AndréSlabber Win User

    windows 10 pro - version 1803 - os build 17134.48 --- "An autentication error has occurred - the function requested is not supported".--cannot connect to remotes server by RDP - please help - André

    "An autentication error has occurred - the function requested is not supported".--cannot connect to remotes server by RDP - please help -
     
    AndréSlabber, Sep 14, 2018
    #2
  3. GenericUser2712 Win User
    Cipher Error : The Request is not supported.


    Upon trying to use Cipher to do some simple encrypting on my machine I have ran into some issues.

    FIX: RDP ERROR THE FUNCTION REQUESTED IS NOT SUPPORTED [​IMG]

    If I execute Cipher.exe from the Command Prompt it seems to be functioning normally and subsequently lists all folders on the current directory with a U in front of them indicating that they are unencrypted, however, when I attempt to encrypt a directory ... or rather the files within it ... I get an error that reads " The request is not supported " beside each file listed in the directory and an overall summery that 0 files were encrypted.

    I noticed that there is no Cipher.dll file on my machine, as according to some due diligence research, perhaps should have been. I located the only cipher.dll I could find, however, upon trying to register it I received an error that " the module was downloaded but the entry point DllRegisterServer was not found. I also found an update on Microsoft's website, (KB4032188), that claimed to resolve known Cipher issues, however, was unable to install it on my machine as it kept stating that the update was not applicable to the particular Windows 10 build I am running. I also tried to use TLS 1.0 only and still received the same error. Any ideas?
     
    GenericUser2712, Sep 14, 2018
    #3
  4. NikkiGarcia02 Win User

    FIX: RDP ERROR THE FUNCTION REQUESTED IS NOT SUPPORTED

    RDP

    • Any changes made on the computer prior to this concern?

      Initially when we received the problem there wasn't any changes made on the computer since we couldn't figure out the problem, we upgraded the pc to windows 10. It fixed the problem momentarily and then it starts again. Then we re initiated the upgrade the
      same day I wrote this post and it was fixed again and then on today the issue is back
    • What troubleshooting steps have you tried so far?

      In the past we would delete the MS Licensing Protocol folder as suggested by so many other posts and restart the RDP connection ad administrator to rebuild it. This time around it didn't fix anything. Like I said previously we've tried to upgrade the PC and
      the fix is temporal
    • Is this the first time that you encountered this problem? No
    • When did you notice about this issue? I'm not sure when it started because I haven't been on this project that long but I would say within the last month based on me. Based on other conversations this has happened in the past.
    • Can you send us a screenshot with the error message that you are getting? Note: Please do not include any personal information.

      Sure
      FIX: RDP ERROR THE FUNCTION REQUESTED IS NOT SUPPORTED d7470294-b2af-4c9c-aa56-a971016a58bf.jpg
     
    NikkiGarcia02, Sep 14, 2018
    #4
Thema:

FIX: RDP ERROR THE FUNCTION REQUESTED IS NOT SUPPORTED

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