Microsoft Download Center - Understand and Troubleshoot Remote Desktop Services Desktop Virtualization in Windows Server "8" Beta

Available updates for Terminal Services (Remote Desktop Services) in Windows Server 2008 (KB2312539)
Available Updates for Remote Desktop Services (Terminal Services) on Windows Server 2008 R2 SP1 (KB2601888)
Available updates for Remote Desktop Services in Windows Server 2012 (KB2821526)
Available Updates for Remote Desktop Services in Windows Server 2012 R2 (KB2933664)
Available Remote Desktop Services updates in Windows Server 2016 (KB4039839)

Remote desktop connection "The local policy of this system does not permit you to logon interactively"
Removing Additional Permissions Granted to Terminal Services Users
Programs can revert to the default settings on Terminal Server
Terminal Server and connected Terminal Services clients pause when a Terminal Services client logs on or logs off
How to turn on the Terminal Services Session Directory logging service
How to lock down a Windows Server 2003 or Windows 2000 Terminal Server session
Copying files larger than 2 GB over a Remote Desktop Services or Terminal Services session by using Clipboard Redirection (copy and paste) fails silently
Remote Desktop Protocol settings in Windows Server 2003 and in Windows XP lists the settings in an .rdp file.

Guidelines for installing the Remote Desktop Session Host role service on a computer running Windows Server 2012 without the Remote Desktop Connection Broker role service (KB2833839)

“Terminal Server Licensing uses Remote Procedure Call (RPC) over port 135, and a dynamically assigned port above 1024.”
Source: Microsoft Windows Server Forum - Does anyone know the appropriate firewall rules to allow RD License Server access?

How Applications use the Registry in Terminal Server Environments (Part 2 of 3)
Finally! Shadow Key Timestamping Utilities from Microsoft

Citrix: Shadow Key timestamps

x64? My Terminal Servers Run Just Fine With 32 Bits and 8/12/16 GB RAM!

O+P Insights - Tuning Windows 2003 Terminal Server (take with a grain of salt)

Tatham Oddie - Strange server behavior – huge I/O other count for csrss.exe (SOLVED!) zie ook:eggheadcafe - csrss.exe High I/O in combination with Terminal service

CitrixTools.Net - Terminal Server & XenApp Tuning Tips

Vera Noest - Remote Desktop Services troubleshooting

brianmadden:
Getting More Users on your Server

* Awesome * Anand * - How to logoff remote desktop sessions via command line tools?
Super User - Keyboard shortcut to minimize Remote Desktop describes several keyboard shortcuts for the Remote Desktop Client.

DONKZ.NL - Overview of .rdp file settings
Microsoft Docs - RDP Settings for Remote Desktop Services in Windows Server 2008 R2
Microsoft Docs - Supported Remote Desktop RDP file settings

TechNet Blogs » Tommy Patterson » Why Server 2012 R2? – Remote Desktop Sessions and Virtual Desktop Infrastructure

Windows Server Forums - Where are tsadmin.msc and tsconfig.msc? provides a hack to be able to use the Server 2008 (R2) tsadmin.msc and tsconfig.msc.
Server Fault - Using tsconfig/tsadmin in Windows Server 2012 locally

Server Fault - Enable Sound for RDP in Windows Server 2012

Remote Desktop Services (Terminal Services) Team Blog

rdesktop A Remote Desktop Protocol Client for accessing Windows NT Terminal Server.
Jacco's rdesktop page for the OS/2 port and links to other rdesktop.
properJavaRDP Java based RDP client based on rdesktop.
Elusiva - Open Source JavaRDP Java based RDP client based on rdesktop and properJavaRDP.
Lixia-JavaRDP GNU GPL v3 licensed Java RDP client for Windows Terminal Services based on properJavaRDP.
FreeRDP is a free implementation of the Remote Desktop Protocol (RDP), released under the Apache license.

Server 2008
Microsoft - Licensing Remote Desktop Services in Windows Server 2008 R2

Server 2003
Brian Madden - The Ultimate Guide to Windows 2003 Terminal Server Licensing see deze link for the PDF version.
Microsoft - Windows Server 2003 Terminal Server Licensing contains a link to a Word document of the same name.
Microsoft - Licensing Terminal Server in Windows Server 2003 R2
Microsoft - Windows Server 2003 Pricing and Licensing: Frequently Asked Questions
Microsoft Support - The function of Terminal Server CALs in Windows Server 2003 (KB822134)
Microsoft Support - Removing Terminal Server licenses from an RDP client (KB187614)

Microsoft Support - Windows 2000 or Windows Server 2003 Terminal Services server logs events 1111, 1105, and 1106 (KB239088)
Microsoft Support - Printers that use ports that do not begin with COM, LPT, or USB are not redirected in a remote desktop or a terminal services session (KB302361)
Microsoft TechNet - Event ID 1111 — Terminal Services Printer Redirection describes the steps for a custom printer mapping file on Windows Server 2008, see deze link for the Windows Server 2008 R2 version.
Ask the Performance Team - Terminal Server and Printer Redirection
Remote Desktop Services (Terminal Services) Team Blog - Using Remote Desktop Easy Print in Windows 7 and Windows Server 2008 R2
Brian Madden - Managing Printer Drivers voor Windows Server 2003.

Open regedit create a connection to the registry of the remote machine. Change the following key value to 0:

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Terminal Server]
"fDenyTSConnections"=dword:00000000

Now the system has RDP enabled. An RDP connection should now be possible if no further (network)restrictions like (Windows) firewall are in place.

A Windows Server 2003 Terminal Server is set to use the license server that grants per user licenses. After logging in to a Juniper SA and setting up an RDP session the following message appeared:

Windows Terminal Server Proxy
No valid software license was available.

Forgot to specify “Per User” with the license server settings on the Terminal Server.
The first error on TechNet - Troubleshooting Remote Desktop Licensing Error Messages gave the clue.

Sometimes you need to update or add registry keys to the shadow key on a Terminal Server.
To let the new keys apply to new user logins, you have to manually update the timestamp key after adding/modifying the registry keys.

Do this:

1. Modify/add the registry keys
2. Calculate the number of seconds since 1 januari 1970 (see UTC calculator link)
3. Modfiy the value of the LatestRegistryKey DWORD below HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Terminal Server\Install\IniFile Times with this new value

Sources:
Ask the Performance Team - Terminal Services - Exploring the Shadows
UTC seconds calculator

Windows Server TechCenter > Windows Server Forums > General > Issue with copying files using RDPClip.exe rather than RDP Mapped Drives
Citrix Knowledge Center> Support Forums > XenApp (Presentation Server) > XenApp 5.0 for Windows Server 2003 / Presentation Server 4.5 > Presentation Server 4.5 - General > File Transfer issue with RDPClip.exe rather than RDP Mapped Drives

Clusters:

Get-WmiObject Win32_SessionDirectoryCluster | Select-Object ClusterName,NumberOfServers | Format-Table -AutoSize

Servers:

Get-WmiObject Win32_SessionDirectoryServer | Select-Object ServerName,ClusterName,NumberOfSessions,ServerWeight | Format-Table -AutoSize

Via: Microsoft - Windows Server Forum - How to read the RD Connect Broker DataBase!!!!

See also:
Microsoft - Windows Dev Center - Win32_SessionDirectoryServer class
Microsoft - Windows Dev Center - Win32_SessionDirectoryCluster class

Problem: When starting a RemoteApp from the RDWeb page that connects via an RD Gateway to 1 of 2 session hosts the RemoteApp tries to connect to the host address of the RDWeb/Gateway server instead of one of the session hosts / the farm address.

If you download the rdp file that gets downloaded from the RDWeb page (don't use IE, use Firefox), open it in Notepad, and change the RDWeb/Gateway address in the line “full address:s:Name OF RDWeb/Gateway server” to the FQDN farm address the RemoteApp works.

Workaround (fix?): Add the full address of the RD Farm to the CustomRdpProperty on the Session Collection with powershell:

Set-RDSessionCollectionConfiguration -CollectionName "Name of RD Session Collection" -CustomRdpProperty "use
 redirection server name:i:1 `n full address:s:rdfarm.domain.com" 

Replace “Name of RD Session Collection” with the name of your RD session collection.
Replace rdfarm.domain.com with the FQDN of your (internal) RD Farm.

Source for the PowerShell option: Server Fault - RDS, RDWeb, and RemoteApp: How to use public certificate for launching apps on session host?