1. Logon Enabled - Check if logons are enabled by executing the command “change logon /query” or from the MetaFrame settings of the server properties within the Citrix management console.
2. Enable Logons - Enable logons by executing the command “change logon /enabled” or by checking the option “enable logons to this server” from the MetaFrame settings of the server properties within the Citrix management console.

3. User TS Enabled - Check if the user has the properties “Allow logon to terminal server” enabled in active directory.
4. Enable Allow TS logon - Enable the options “Allow logon to terminal server” for the user in Active Directory.
5. Application Mode Enabled - Launch the Terminal Services Configuration MMC and check if Terminal Server Mode is set to Application Server.
6. Enable Application Mode - Launch the add/remove software control panel. Click the Add/Remove Windows Components button and click next. Change the Terminal Services option to Application server mode.
7. TS Licenses Available - Check if a Terminal Server License Server is available, activated and licenses are installed.
8. Install Licenses - Install a Terminal Server License Server and install the Terminal Server Licenses.
9. Administrative Logon - Try to logon as a administrator using a RDP session
10. Debug usrlogon process Set the following registry key on the server to debug the logon process:
Key: HKLM\Software\Microsoft\Windows NT\CurrentVersion\Winlogon
Value: UserEnvDebugLevel
Type: REG_DWORD
Data: 10002 (Hex)
The data value of 10002 will enable verbose logging to a file on the server. Once you set this value, reboot your server and check for a “userenv.log” file in the %System-Root%\Debug\UserMode\ folder.
Remember to turn this off when you’re done troubleshooting it, since each user logon can easily add 100KB to the size of this log file.
11. Check Event Log - Check the Event Log for warning or error messages. Lookup the Event ID’s to check if it’s a known error.
12. Fix errors - If the error message is a known error fix it according the given resolution.