This information can be very useful, because as you might know, there are build numbers and version numbers, and it become a mess very fast when you try to list all ICA client version connecting your Citrix Presentation / XenApp servers. 4.00.581 4.00.686 4.20.715 4.20.727 4.20.741 4.21.779 6.00.910 6.01.963 6.01.964 6.01.967 6.20.985 6.30.1050 6.31.1051 7.00.17534 7.01.20497 7.10.21845 7.10.22650 8.00.24737 8.100.29670 9.00.32649 9.10.36280 9.150.39151 9.200.44376 9.230.50211 9.237.53063 9.7 (Java client) 10.00.45418 10.00.49686 10.00.52110 10.100.55836 10.150.58643 10.200.2650 11.00.5284 (beta Windows) 11.00.5357 11.0.150.5357 11.1.0.19460 11.16.153430 11.2.0.169077 (Mac) 11.2.0.31560 11.2.2.3 11.2.38.1 11.2.5.2 11.3.143202 (HP Thin Client) 11.3.2.176933 (Mac) 11.4.0.188921 (Mac) 11.4.3.192268 (Mac) 12.0.0.184893 12.0.0.189834 12.0.0.6410 12.0.3.6 12.0.13.1 12.1.0.30 12.1.44.1 (ActiveX Web Client - Fix for IE9) 13.0.0.13 (beta Project Mach 3) 13.0.0.6645 (with Receiver 3.0.0.56410 - Windows) 13.0.0.6684 (XenApp 6.5 DVD) 13.0.0.6685 (Citrix website download) 13.1.0.45 (with Receiver 3.1 Tech Preview - Windows There are several way to list all client version connecting to a PS or XenApp farm, my favorite because the simplest one is by using Edgesight. You need to open you Edgesight website and go to the "Browse" tab and then click on "Session" category and this is it "ICA Client Version" is here waiting for your click. The result will be this kind of report : I will post in next few days how to retrieve the client version with a vbs script and then using Powershell scripting. Updated 08 Dec 2010 : added more detail about version 11.3.143202 and some new version released. Updated 23 Sept 2011 : Many client version added, Java & Mac Updated 30 Oct 2011 : added 13.1.0.45 (Receiver 3.1 Tech Preview) Update 21 Nov 2011 : added 11.4.3.192268 (Mac) Update 22 Nov 2011 : added XenApp 6.5 DVD media plug-ins + ActiveX versions (Thx Neil Spellings)