The advantages of Network Level Authentication are: It requires fewer remote computer resources initially. Close Group Policy Editor and reboot the machine for changes to take effect. The Network security: LAN Manager authentication level setting determines which challenge/response authentication protocol is used for network logons. Close out of GPMC. 4] Click ‘Apply’ and then click ‘OK’ or hit the ‘Enter’ button to disable Network Level Authentication. 1. Note that there could be existing group policy that sets the LMCompatibilityLevel value, so you may need to review your existing GPOs to ensure that the right value is set. Click Start, click Run, type regedit, and then press ENTER. Require user authentication for remote connections by using Network Level Authentication – Set this to Enabled. If you are an administrator on the remote computer, you … Configure Network Level Authentication. To enable Network Level Authentication (NLA) through Group Policies, you must enable this policy : Require user authentication for remote connections by using Network Level Authentication. Once those changes have been made, you can close the Local Group Policy Editor. Network Level Authentication was introduced in RDP 6.0 and supported initially in Windows Vista. Solution Enable Network Level Authentication (NLA) on the remote RDP server. In the navigation pane, locate and then click the following registry subkey: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa 3. This choice affects the authentication protocol level that clients use, the session security level that the computers negotiate, and the authentication level that servers accept. There aren’t any more settings to configure. How to disable / enable Network Level Authentication (NLA) for RDP. In the details pane, right-click Security Packages, and then click Modify. The last security recommendation we have is to change the default port that Remote Desktop listens on. Next, go to the remote tab and uncheck the checkbox for the “Allow connections only from computers running Remote Desktop with Network Level Authentication (recommended)” option. 2. Last but certainly not least, we need to apply the newly created GPO to an Organizational Unit so it actually works. Set Require user authentication for remote connections by using Network Level Authentication to Enable. In addition to improving authentication, NLA also helps protect the remote computer from malicious users and software by completing user authentication before a full RDP connection is established. Source: Based on a VMware Knowledge Base article Establishing a RDP connection with a Windows 8.1 Desktop from Horizon View Client for … The GPO setting is located at: Computer/Policies/Windows Settings/Local Policies/Security Options/Network Security: LAN Manager authentication level. enable network level authentication gpo, Change "Require user authentication for remote connections by using Network Level Authentication" to Disabled. 5] Reboot your device and check if you can connect devices remotely. While working on domain-controlled systems, upon trying to remotely access computers, users have reported the following error: “The remote computer that you are trying to connect to requires network level authentication (NLA), but your windows domain controller cannot be contacted to perform NLA. Go to your control panel-> System and Security; Allow remote access; Enable or disable Network Level Authentication-> OK; Done! Disabling and enabling NLA is quite easy. 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