The following error occurs after installing XenApp 6.x with the meta-installer, using the Graphic User Interface (GUI) or the command line:

“The remote computer requires Network Level Authentication, which your computer does not support. For assistance, contact your system administrator or technical support.”

Network Level Authentication (NLA) is recommended, however RDC client versions earlier to version 6.1, do not support NLA.

Complete the following installation steps to resolve the error:

Pre-installation Steps to Prevent the Requirement of NLA

The default installation of Remote Desktop Services (RDS), using ServerManager, does not require NLA. Installing RDS prior to running the XenApp 6 meta-installer prevents the requirement of NLA.

This can also be done using the following PowerShell commands:

PS > Import-Module ServerManager

PS > Add-WindowsFeature RDS-RD-Server

Restart after adding the RDS role.

Post-installation Steps to Disable NLA

1. To disable NLA, launch ServerManager.

2. Navigate to Roles > Remote Desktop Services > RD Session Host Configuration.

3. Right-click on the RDP-Tcp connections to open a Properties window.

4. Under the General tab, clear the Allow connections only from computers running Remote Desktop with Network Level Authentication check box.

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Problem Cause

This error may occur if NLA is required.

This article documents options for disabling or preventing a requirement for Network Level Authentication for Remote Desktop Connections to XenApp 6 servers.