Microsoft Remote Desktop Connection Refused Mac

10.04.2020
39 Comments

Feb 10, 2016  Remote Desktop Connection to Windows 10 Home - Unable to make I purchased several Intel NUC Computers with Windows 10 Home - Was assured by Intel & Microsoft that as Remote Desktop is part of Windows 10 Home and I will have a full blown remote capability. I followed and double checked all posted configuration settings for Windows 10 to allow to. I enabled Sharing / Remote Management as per macOS Sierra: Allow Remote Desktop to access your computer. And set up a VNC client (MS Remote Desktop) with username and password, connecting to iMac.local (name provided by OS X in Sharing screen). Then get 'Connection Refused' on every try.

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Use these steps when a Remote Desktop client can't connect to a remote desktop but doesn't provide messages or other symptoms that would help identify the cause.

Check the status of the RDP protocol

Check the status of the RDP protocol on a local computer

To check and change the status of the RDP protocol on a local computer, see How to enable Remote Desktop.

Note

If the remote desktop options are not available, see Check whether a Group Policy Object is blocking RDP.

Desktop

Check the status of the RDP protocol on a remote computer

Important

Follow this section's instructions carefully. Serious problems can occur if the registry is modified incorrectly. Before you starty modifying the registry, back up the registry so you can restore it in case something goes wrong.

To check and change the status of the RDP protocol on a remote computer, use a network registry connection:

  1. First, go to the Start menu, then select Run. In the text box that appears, enter regedt32.
  2. In the Registry Editor, select File, then select Connect Network Registry.
  3. In the Select Computer dialog box, enter the name of the remote computer, select Check Names, and then select OK.
  4. Navigate to HKEY_LOCAL_MACHINESYSTEMCurrentControlSetControlTerminal Server.
    • If the value of the fDenyTSConnections key is 0, then RDP is enabled.
    • If the value of the fDenyTSConnections key is 1, then RDP is disabled.
  5. To enable RDP, change the value of fDenyTSConnections from 1 to 0.

Check whether a Group Policy Object (GPO) is blocking RDP on a local computer

If you can't turn on RDP in the user interface or the value of fDenyTSConnections reverts to 1 after you've changed it, a GPO may be overriding the computer-level settings.

To check the group policy configuration on a local computer, open a Command Prompt window as an administrator, and enter the following command:

After this command finishes, open gpresult.html. In Computer ConfigurationAdministrative TemplatesWindows ComponentsRemote Desktop ServicesRemote Desktop Session HostConnections, find the Allow users to connect remotely by using Remote Desktop Services policy.

  • If the setting for this policy is Enabled, Group Policy is not blocking RDP connections.

  • If the setting for this policy is Disabled, check Winning GPO. This is the GPO that is blocking RDP connections.

Check whether a GPO is blocking RDP on a remote computer

To check the Group Policy configuration on a remote computer, the command is almost the same as for a local computer:

The file that this command produces (gpresult-<computer name>.html) uses the same information format as the local computer version (gpresult.html) uses.

Modifying a blocking GPO

You can modify these settings in the Group Policy Object Editor (GPE) and Group Policy Management Console (GPM). For more information about how to use Group Policy, see Advanced Group Policy Management.

To modify the blocking policy, use one of the following methods:

  • In GPE, access the appropriate level of GPO (such as local or domain), and navigate to Computer Configuration > Administrative Templates > Windows Components > Remote Desktop Services > Remote Desktop Session Host > Connections > Allow users to connect remotely by using Remote Desktop Services.
    1. Set the policy to either Enabled or Not configured.
    2. On the affected computers, open a command prompt window as an administrator, and run the gpupdate /force command.
  • In GPM, navigate to the organizational unit (OU) in which the blocking policy is applied to the affected computers and delete the policy from the OU.

Check the status of the RDP services

On both the local (client) computer and the remote (target) computer, the following services should be running:

  • Remote Desktop Services (TermService)
  • Remote Desktop Services UserMode Port Redirector (UmRdpService)

You can use the Services MMC snap-in to manage the services locally or remotely. You can also use PowerShell to manage the services locally or remotely (if the remote computer is configured to accept remote PowerShell cmdlets).

On either computer, if one or both services are not running, start them.

Note

If you start the Remote Desktop Services service, click Yes to automatically restart the Remote Desktop Services UserMode Port Redirector service.

Check that the RDP listener is functioning

Important

Follow this section's instructions carefully. Serious problems can occur if the registry is modified incorrectly. Before you starty modifying the registry, back up the registry so you can restore it in case something goes wrong.

Check the status of the RDP listener

For this procedure, use a PowerShell instance that has administrative permissions. For a local computer, you can also use a command prompt that has administrative permissions. Microsoft office for mac new version. However, this procedure uses PowerShell because the same cmdlets work both locally and remotely.

  1. To connect to a remote computer, run the following cmdlet:

  2. Enter qwinsta.

  3. If the list includes rdp-tcp with a status of Listen, the RDP listener is working. Proceed to Check the RDP listener port. Otherwise, continue at step 4.

  4. Export the RDP listener configuration from a working computer.

    1. Sign in to a computer that has the same operating system version as the affected computer has, and access that computer's registry (for example, by using Registry Editor).
    2. Navigate to the following registry entry:
      HKEY_LOCAL_MACHINESYSTEMCurrentControlSetControlTerminal ServerWinStationsRDP-Tcp
    3. Export the entry to a .reg file. For example, in Registry Editor, right-click the entry, select Export, and then enter a filename for the exported settings.
    4. Copy the exported .reg file to the affected computer.

  5. To import the RDP listener configuration, open a PowerShell window that has administrative permissions on the affected computer (or open the PowerShell window and connect to the affected computer remotely).

    1. To back up the existing registry entry, enter the following cmdlet:

    2. To remove the existing registry entry, enter the following cmdlets:

    3. To import the new registry entry and then restart the service, enter the following cmdlets:

      Replace <filename> with the name of the exported .reg file.

  6. Test the configuration by trying the remote desktop connection again. If you still can't connect, restart the affected computer.

  7. If you still can't connect, check the status of the RDP self-signed certificate.

Check the status of the RDP self-signed certificate

Mac
  1. If you still can't connect, open the Certificates MMC snap-in. When you are prompted to select the certificate store to manage, select Computer account, and then select the affected computer.
  2. In the Certificates folder under Remote Desktop, delete the RDP self-signed certificate.
  3. On the affected computer, restart the Remote Desktop Services service.
  4. Refresh the Certificates snap-in.
  5. If the RDP self-signed certificate has not been recreated, check the permissions of the MachineKeys folder.

Check the permissions of the MachineKeys folder

  1. On the affected computer, open Explorer, and then navigate to C:ProgramDataMicrosoftCryptoRSA.
  2. Right-click MachineKeys, select Properties, select Security, and then select Advanced.
  3. Make sure that the following permissions are configured:
    • BuiltinAdministrators: Full control
    • Everyone: Read, Write

Check the RDP listener port

On both the local (client) computer and the remote (target) computer, the RDP listener should be listening on port 3389. No other applications should be using this port.

Important

Follow this section's instructions carefully. Serious problems can occur if the registry is modified incorrectly. Before you starty modifying the registry, back up the registry so you can restore it in case something goes wrong.

To check or change the RDP port, use the Registry Editor:

  1. Go to the Start menu, select Run, then enter regedt32 into the text box that appears.
    • To connect to a remote computer, select File, and then select Connect Network Registry.
    • In the Select Computer dialog box, enter the name of the remote computer, select Check Names, and then select OK.
  2. Open the registry and navigate to HKEY_LOCAL_MACHINESYSTEMCurrentControlSetControlTerminal ServerWinStations<listener>.
  3. If PortNumber has a value other than 3389, change it to 3389.

    Important

    You can operate Remote Desktop services using another port. However, we don't recommend you do this. This article doesn't cover how to troubleshoot that type of configuration.

  4. After you change the port number, restart the Remote Desktop Services service.

Check that another application isn't trying to use the same port

For this procedure, use a PowerShell instance that has administrative permissions. For a local computer, you can also use a command prompt that has administrative permissions. However, this procedure uses PowerShell because the same cmdlets work locally and remotely.

  1. Open a PowerShell window. To connect to a remote computer, enter Enter-PSSession -ComputerName <computer name>.

  2. Enter the following command:

  3. Look for an entry for TCP port 3389 (or the assigned RDP port) with a status of Listening.

    Note

    The process identifier (PID) for the process or service using that port appears under the PID column.

  4. To determine which application is using port 3389 (or the assigned RDP port), enter the following command:

  5. Look for an entry for the PID number that is associated with the port (from the netstat output). The services or processes that are associated with that PID appear on the right column.

  6. If an application or service other than Remote Desktop Services (TermServ.exe) is using the port, you can resolve the conflict by using one of the following methods:

    • Configure the other application or service to use a different port (recommended).
    • Uninstall the other application or service.
    • Configure RDP to use a different port, and then restart the Remote Desktop Services service (not recommended).

Check whether a firewall is blocking the RDP port

Use the psping tool to test whether you can reach the affected computer by using port 3389.

  1. Go to a different computer that isn't affected and download psping from https://live.sysinternals.com/psping.exe.

  2. Open a command prompt window as an administrator, change to the directory in which you installed psping, and then enter the following command:

  3. Check the output of the psping command for results such as the following:

    • Connecting to <computer IP>: The remote computer is reachable.
    • (0% loss): All attempts to connect succeeded.
    • The remote computer refused the network connection: The remote computer is not reachable.
    • (100% loss): All attempts to connect failed.

  4. Run psping on multiple computers to test their ability to connect to the affected computer.

  5. Note whether the affected computer blocks connections from all other computers, some other computers, or only one other computer.

  6. Recommended next steps:

    • Engage your network administrators to verify that the network allows RDP traffic to the affected computer.
    • Investigate the configurations of any firewalls between the source computers and the affected computer (including Windows Firewall on the affected computer) to determine whether a firewall is blocking the RDP port.

The following page(s) contain instructions on using Remote Desktop to connect to Faculty & Staff Windows computers on the UMKC campus (from off-campus). Your campus computer must be powered on to receive connections.

Microsoft Remote Desktop Connection Refused Mac Drive


Don't know your computer name or don't know if your account has the correct permissions? Find out here. If you need assistance, please contact the IS Technology Support Center or your IT Liaison.

Please note: Before you attempt to connect to UMKC resources remotely, please make sure your operating system (Apple OS X) has all applicable security updates installed.

Remote Desktop Connection For Mac


To connect to your campus Windows PC from a Mac you will need to use the Microsoft Remote Desktop application for Mac version 10.3.8 (or higher). If you are using a university-owned Mac, you may already have this app installed. Please contact the Technology Support Center or your IT Liaison if you have questions about using this software on a university-owned Mac.

Remote Desktop Connection Manager For Mac

SupportedDefault IconClient Name
Microsoft RDP v10
Link to Download
Microsoft RDP v8
Apple RDC

Mac OS X Remote Desktop Connection Instructions

  1. Open the Microsoft Remote Desktop application
  2. Click the '+' icon
  3. Select PC
  4. For PC Name, enter the name of the remote computer to connect to. Or check How to find my computer name
  5. For User Account, click the dropdown to change the setting
  6. Click Add User Account
  7. For User Name, type UMKCusername@umsystem.edu in DomainUsername
  8. For Password, type your UMKC Username Password. Note: you will need to update your Remote Desktop settings every time you change your UMKC Username password.
  9. Click Save
  10. For Friendly Name, enter the PC name
  11. Click on no gateway to change the setting
  12. Select Add Gateway from the dropdown
  13. For Server Name, enter tsg.umkc.edu
  14. For User Account, click Use PC User account
  15. Select your UMKC username from the list
  16. Click Add
  17. Click Add again
  18. To initiate the connection, double click on your PC Name tile
  19. Click Show Certificate
  20. Click Always Trust to prevent seeing this warning again for the PC specified
  21. Click Continue

Microsoft Remote Desktop Connection Refused Mac Computer

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