What is ssonsvr.exe?

The genuine ssonsvr.exe file is a software component of Citrix ICA Client by Citrix.
The Citrix ICA Client is a part of a technology that provides server-based computing services to any type of client device. Ssonsvr.exe runs the process for the Single SignOn Server, an authentication mechanism for the Citrix ICA Client. This is not an essential process for Windows and can be disabled if known to create problems. The Citrix ICA Client offers a port to devices requiring server-based computing or cloud-computing services, enabling clients to run software without downloading it. The client can be installed and run from any personal computer, Windows-based terminal, network computer, or any type of appliance, allowing the user to access and interact with 32-bit Windows-based and Java applications that are completely centrally managed. Citrix Systems, Inc. is an American company that develops software solutions in networking, application and desktop virtualization, server technology, cloud-based computing, and offers software as a service (SaaS). Citrix was established in 1989, originally as Citrus, by Ed Iacobucci, a former IBM developer. The company soon developed Citrix Multiuser, a port for OS/2, which used Independent Computing Architecture (ICA) that allowed multiple simultaneous users to access server applications, even from computers not built to run OS/2. Citrix currently employs 9,000 people and is headquartered in Santa Clara, California, USA.

SSOnSvr stands for Single SignOn Server

The .exe extension on a filename indicates an executable file. Executable files may, in some cases, harm your computer. Therefore, please read below to decide for yourself whether the ssonsvr.exe on your computer is a Trojan that you should remove, or whether it is a file belonging to the Windows operating system or to a trusted application.

Click to Run a Free Scan for ssonsvr.exe related errors

Ssonsvr.exe file information

Windows Task Manager with ssonsvr
Ssonsvr.exe process in Windows Task Manager

The process known as Program Neighborhood or Citrix Pass-through Authentication

belongs to software Citrix ICA Client or Citrix Program Neighborhood or Citrix_0902_ENU_CEIC_B01 or Citrix XenApp Plugin for Hosted or Citrix Presentation Server Client or Citrix Receiver(SSON) or Citrix Presentation Server or Citrix online plug-in

by Citrix Systems (

Description: Ssonsvr.exe is not essential for the Windows OS and causes relatively few problems. Ssonsvr.exe is located in a subfolder of "C:\Program Files"—e.g. C:\Program Files\Citrix\ICA Client\. Known file sizes on Windows 10/8/7/XP are 16,656 bytes (52% of all occurrences), 37,136 bytes and 12 more variants. 
The program is not visible. It is not a Windows system file. There is no description of the program. Therefore the technical security rating is 43% dangerous, however you should also read the user reviews.

Uninstalling this variant: You can do the following:
  • search for help on the company's website
  • uninstall the program using the Control Panel ⇒ Uninstall a ProgramCitrix ICA Client or Citrix Program Neighborhood

Recommended: Identify ssonsvr.exe related errors

Important: Some malware camouflages itself as ssonsvr.exe, particularly when located in the C:\Windows or C:\Windows\System32 folder. Therefore, you should check the ssonsvr.exe process on your PC to see if it is a threat. We recommend Security Task Manager for verifying your computer's security. This was one of the Top Download Picks of The Washington Post and PC World.


User Comments

Citrix PNAgent
Part of a citrix client
  Anne W, Koster   (further information)
citrix pnagent
Citrix Client
It is installed as part of Citrix ICA Client and is necessary for Pass Through authentication
  Shawn D. Lambert   (further information)
single sign on service -= passthrough

Rating chart

Summary: Average user rating of ssonsvr.exe: based on 12 votes with 6 user comments. 9 users think ssonsvr.exe is essential for Windows or an installed application. 2 users think it's neither essential nor dangerous. One user thinks ssonsvr.exe is dangerous and recommends removing it. 2 users don't grade ssonsvr.exe ("not sure about it").

Do you have additional information?
What do you know about ssonsvr.exe:
How would you rate it:
Link for more info:
Your Name:

Best practices for resolving ssonsvr issues

A clean and tidy computer is the key requirement for avoiding problems with ssonsvr. This means running a scan for malware, cleaning your hard drive using 1cleanmgr and 2sfc /scannow, 3uninstalling programs that you no longer need, checking for Autostart programs (using 4msconfig) and enabling Windows' 5Automatic Update. Always remember to perform periodic backups, or at least to set restore points.

Should you experience an actual problem, try to recall the last thing you did, or the last thing you installed before the problem appeared for the first time. Use the 6resmon command to identify the processes that are causing your problem. Even for serious problems, rather than reinstalling Windows, you are better off repairing of your installation or, for Windows 8 and later versions, executing the 7DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.

To help you analyze the ssonsvr.exe process on your computer, the following programs have proven to be helpful: ASecurity Task Manager displays all running Windows tasks, including embedded hidden processes, such as keyboard and browser monitoring or Autostart entries. A unique security risk rating indicates the likelihood of the process being potential spyware, malware or a Trojan. BMalwarebytes Anti-Malware detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.

Other processes

ssonsvr.exe [all]