In order to issue licenses to RDP clients, your RDS License Server must be activated. To do it, open the Remote Desktop Licensing Manager (licmgr.exe), right-click the name of your server, and select Activate Server.
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The RDS licensing server activation wizard will start. Here you will need to select the activation method you prefer. If your server is connected to the Internet, it can automatically connect to Microsoft servers and activate the RDS license server. If there is no direct Internet access from the server, you can activate the server using a web browser or by phone.
If you right-click the server name in the console and select Review Configuration, you can verify that the RDS License Server is activated and can be used to activate RDSH clients in your domain.
After the RDS License Server is activated and being run, you can reconfigure RD Session Host to obtain CAL licenses from this server. You can set the license type and specify the name of the license server from the Server Manager GUI, using PowerShell, or Group Policy.
You can check for open ports using the PortQry tool or the Test-NetConnection cmdlet. Try to check the RD License Server status and the number of the issued licenses using the Remote Desktop Licensing Diagnoser tool (lsdiag.msc or Administrative Tools -> Remote Desktop Services -> RD Licensing Diagnoser). RD Licensing Diagnoster can be installed on RDSH servers using Server Manager (Features -> Remote Server Administration Tools -> Role Administration Tools -> Remote Desktop Services Tools -> Remote Desktop Licensing Diagnoser Tools).
I got an internal inquiry, though I am not convinced why they want to know the details (which server). We have a cluster of dual (active/backup) servers, where the authentication licensing is configured on the main then backup servers (WS2016). A group of users(say 10) initiated sessions via remote desktop to the cluster, but none of the servers is showing any licensing authentication (No of licenses is shown as 0 on the dashboard). But sessions/connections are up. The question is how to determine which server is providing which authentication licensing number to which user, and how to visualize that (not sure if authentication license manager can do that)? Initially 50 licenses x 4 groups (i.e. total 200 licenses) were configured on the main then backup servers. It might be confusing and difficult to understand the situation. I hope a professional administrator can advise me and appreciate your early feedback. Thanks.
You must specify the name/IP address of your RDS Licensing server manually (via GPO, RDS depoyment configuration, or PowerShell).ADDS does not know where your RDS Lic servers are running.There is only one Terminal Server License Servers group, in which all hosts with the RDS Licensing role can be listed.
I think the grace period is being used on your RDSH host. Check the number of days remaining until the end of the RDS grace period with the command:wmic /namespace:\\root\CIMV2\TerminalServices PATH Win32_TerminalServiceSetting WHERE (__CLASS !="") CALL GetGracePeriodDays -remote-desktop-session-host-server-does-not-have-a-remote-desktop-license-server-specified/
Remote Desktop Services (RDS), known as Terminal Services in Windows Server 2008 and earlier,[1] is one of the components of Microsoft Windows that allow a user to initiate and control an interactive session[2] on a remote computer or virtual machine over a network connection. RDS was first released in 1998 as Terminal Server in Windows NT 4.0 Terminal Server Edition, a stand-alone edition of Windows NT 4.0 Server that allowed users to log in remotely. Starting with Windows 2000, it was integrated under the name of Terminal Services as an optional component in the server editions of the Windows NT family of operating systems,[3] receiving updates and improvements with each version of Windows.[4] Terminal Services were then renamed to Remote Desktop Services with Windows Server 2008 R2[5] in 2009.
RDS is Microsoft's implementation of thin client architecture, where Windows software, and the entire desktop of the computer running RDS, are made accessible to any remote client machine that supports Remote Desktop Protocol (RDP). User interfaces are displayed from the server onto the client system and input from the client system is transmitted to the server - where software execution takes place.[6] This is in contrast to application streaming systems, like Microsoft App-V, in which computer programs are streamed to the client on-demand and executed on the client machine.
For an organization, RDS allows the IT department to install applications on a central server instead of multiple computers.[11] Remote users can log on and use those applications over the network. Such centralization can make maintenance and troubleshooting easier. RDS and Windows authentication systems prevent unauthorized users from accessing apps or data.
The key server component of RDS is Terminal Server (termdd.sys), which listens on TCP port 3389. When a Remote Desktop Protocol (RDP) client connects to this port, it is tagged with a unique SessionID and associated with a freshly spawned console session (Session 0, keyboard, mouse and character mode UI only). The login subsystem (winlogon.exe) and the GDI graphics subsystem is then initiated, which handles the job of authenticating the user and presenting the GUI. These executables are loaded in a new session, rather than the console session. When creating the new session, the graphics and keyboard/mouse device drivers are replaced with RDP-specific drivers: RdpDD.sys and RdpWD.sys. The RdpDD.sys is the device driver and it captures the UI rendering calls into a format that is transmittable over RDP. RdpWD.sys acts as keyboard and mouse driver; it receives keyboard and mouse input over the TCP connection and presents them as keyboard or mouse inputs. It also allows creation of virtual channels, which allow other devices, such as disc, audio, printers, and COM ports to be redirected, i.e., the channels act as replacement for these devices. The channels connect to the client over the TCP connection; as the channels are accessed for data, the client is informed of the request, which is then transferred over the TCP connection to the application. This entire procedure is done by the terminal server and the client, with the RDP mediating the correct transfer, and is entirely transparent to the applications.[13] RDP communications are encrypted using 128-bit RC4 encryption. Windows Server 2003 onwards, it can use a FIPS 140 compliant encryption schemes.[6]
Once a client initiates a connection and is informed of a successful invocation of the terminal services stack at the server, it loads up the device as well as the keyboard/mouse drivers. The UI data received over RDP is decoded and rendered as UI, whereas the keyboard and mouse inputs to the Window hosting the UI is intercepted by the drivers, and transmitted over RDP to the server. It also creates the other virtual channels and sets up the redirection. RDP communication can be encrypted; using either low, medium or high encryption. With low encryption, user input (outgoing data) is encrypted using a weak (40-bit RC4) cipher. With medium encryption, UI packets (incoming data) are encrypted using this weak cipher as well. The setting "High encryption (Non-export)" uses 128-bit RC4 encryption and "High encryption (Export)" uses 40-bit RC4 encryption.[14]
Terminal Server is the server component of Terminal services. It handles the job of authenticating clients, as well as making the applications available remotely. It is also entrusted with the job of restricting the clients according to the level of access they have. The Terminal Server respects the configured software restriction policies, so as to restrict the availability of certain software to only a certain group of users. The remote session information is stored in specialized directories, called Session Directory which is stored at the server. Session directories are used to store state information about a session, and can be used to resume interrupted sessions. The terminal server also has to manage these directories. Terminal Servers can be used in a cluster as well.[6]
In Windows Server 2008, it has been significantly overhauled. While logging in, if the user logged on to the local system using a Windows Server Domain account, the credentials from the same sign-on can be used to authenticate the remote session. However, this requires Windows Server 2008 to be the terminal server OS, while the client OS is limited to Windows Server 2008, Windows Vista and Windows 7. In addition, the terminal server may be configured to allow connection to individual programs, rather than the entire desktop, by means of a feature named RemoteApp. Terminal Services Web Access (TS Web Access) makes a RemoteApp session invocable from the web browser. It includes the TS Web Access Web Part control which maintains the list of RemoteApps deployed on the server and keeps the list up to date. Terminal Server can also integrate with Windows System Resource Manager to throttle resource usage of remote applications.[4]
Terminal Server is managed by the Terminal Server Manager Microsoft Management Console snap-in. It can be used to configure the sign in requirements, as well as to enforce a single instance of remote session. It can also be configured by using Group Policy or Windows Management Instrumentation. It is, however, not available in client versions of Windows OS, where the server is pre-configured to allow only one session and enforce the rights of the user account on the remote session, without any customization.[6]
A RemoteApp can be packaged either as a .rdp file or distributed via an .msi Windows Installer package. When packaged as an .rdp file (which contains the address of the RemoteApp server, authentication schemes to be used, and other settings), a RemoteApp can be launched by double clicking the file. It will invoke the Remote Desktop Connection client, which will connect to the server and render the UI. The RemoteApp can also be packaged in a Windows Installer database, installing which can register the RemoteApp in the Start menu as well as create shortcuts to launch it. A RemoteApp can also be registered as handler for file types or URIs. Opening a file registered with RemoteApp will first invoke Remote Desktop Connection, which will connect to the terminal server and then open the file. Any application which can be accessed over Remote Desktop can be served as a RemoteApp.[24] 2ff7e9595c
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