Here you will find instructions on how to install and configure the Citrix software for accessing the (new) Windows Terminal Server or to use it via a web browser.

Microsoft has changed the license policy since beginning of 2015. That is why all needed Windows accounts have to register in a special group in our active directory. You may request this via an email to the ticket system (windows-service at  

You can still use your Citrix client, but you will need to set up a new account for the new Terminal Server Farm.

Start the Citrix receiver and log in. You will now see the apps of the old farm.

Left-click the small arrow next to your account and select Accounts:


Select Add and type the address for the new terminal server farm in the following window:


Please type your user name (without campus) and password


Both accounts are now visible. Please remove the account for that no longer works.

(Select - Remove)



After OK you will see all apps released for you in the new farm.

With Citrix Receiver, you are able to access to the Windows Terminal Server from outside the GSI Windows domain.
So GSI Windows environment (data, e-mail, SAP, etc.) is available. To establish the connection, client software must be installed and configured on the device.
The Citrix Receiver is available for all standard operating systems at GSI:


There are different ways for software installation depending on you are located inside or outside the GSI domain:


  • inside - Citrix Receiver is available as standard. Please note that these instructions are only valid for newer Debian versions such as Wheezy or Jessie, not for Squeeze and earlier.
  • outside - Please download the actual version of Citrix Receiver for Linux from this web site:


Please download the actual plugin from this web site:

You will be asked for the Server Address. Type: and click the Button Next:


If the version without Single Sign On was installed, enter the user data here:

User:        Your_user name

Password: your_Password


The Citrix Storefront will be displayed, with all applications available for selection.

  • Desktop = various terminal servers with Windows 2012 R2 and Office2016
  • Office2010 = one terminal servers with Windows 2012 R2 and Office2010

To establish the connection can take quite a while depending on your internet access.

  • Users of a Windows operating system should always use the client. (see above) 
  • Users of a Linux operating System are able to use the new version of the Citrix client with the web browser of your choice for working on a Windows Terminal Server. Type the address into the address bar.

This opens the start Screen. Log in with your Windows user name (without campus) and password:


The login procedure can take several minutes.

All needed certificates are already installed on Citrix installations on Windows / Linux supported by Windows group or HPC.

In other cases you must install the following certificate:

Linux - outside

Ubuntu: Save the certificates in PEM format in the directory /opt/Citrix/ICAClient/keystore/cacerts
If necessary, execute the command /opt/Citrix/ICAClient/util/ctx_rehash.

To convert a certificate file from DER to PEM you may call the following command:
openssl x509 -in file.crt -inform der -out file.pem -outform pem

Please note that the path could be different in other distributions or Citrix Versions.

You may need to delete the Citrix certificate directory completely and create a symlink to /etc/ssl/certs instead.

Start manually

Windows 7: Start (all)Programs Citrix Receiver

Windows 10: Start Citrix Receiver


A toolbar with the following functions is available at the top of the Citrix window:

  • Home: Minimizes all Desktop Viewer Windows
  • Ctrl+Alt+Del: Lock screen, Logout, Change password, Task Manager
  • Settings: Options for file access, connections, Display
  • Full screen: Switching between window sizes
  • Separate: Disconnect session to resume later
  • Links:



Explorer labels

In the explorer you can see

  • the drives (without the floppy) of your (local) PC and
  • the drives on the Terminal Server.

The drives of your own PC have the label on your client, example: on DEPCnnn. The network drives on the terminal server have the name of the server or DFS, e.g. \winfilesvi\... or \campus\...


Close your der Terminal Server session

If you want to close a terminal server session, always choose Start - Log off.

It is also possible to leave the session in order to continue it at a later time. In this case, choose the corresponding function from the toolbar.

The past has unfortunately shown that this occasionally leads to problems and prevents a later registration. In these cases, contact the UHD or create a ticket at windows-service(at)



User profile

The profile stored on the server for these terminal servers is called ConfigTS.V2, it must be configured (Outlook, network drives, printer, desktop) after the 1st call.

Your network drives, which you have connected in your desktop Windows profile, can also be easily imported into this profile via the Software Center.


You can copy additional configurations from the Windows10 profile:

  • Desktop
    Source: Q:\Config.V6\Desktop
    Target: C:\users\your_username\Desktop
  • Outlook-Signature
    Source: Q:\Config.V6\AppData\Roaming\Microsoft\Signatures
    Target: C:\users\your_username\AppData\Roaming\Microsoft\Signatures (the directory is only created after the 1st start of Outlookt)

On every saturday between 2 and 3 a.m. limitations in the availability of the server will occur (availability updates will be installed and servers will restart).
Please consider this in your use of the services.

If you have any further questions or remarks, please contact windows-service.