For testing of sorts, lets say you want to test how well your application performs with the ICA compression Turned OFF. Indeed, there are multiple scenarios where this test could be used.

Why test ICA Compression:

1. Application specific data (xml) becomes corrupted either via a published application, a streamed application or through client streaming.
2. Benchmark application response times need to be tested for performance reasons.
3. You suspect there may be a Citrix relevant issue in regards to ICA Compression.
4. Compression devices such as Riverbed and Bluecoat are not running as expected
5. Corrupt xml configuration files, application configuration files.

Here is how one would go about disabling ICA Compression:

1. Option #1 On a per machine basis modify Program Neighborhood with the following settings:
   1. Open Program Neighborhood
   2. Right-Click on the name of your farm
   3. Select Application Set Settings
   4. Click on the Default Options tab
   5. remove the check mark next to Use Data Compression
   6. click on OK to proceed
   7. If you have any custom configurations, perform steps 1 through 6 for each configuration on an as needed basis.
2. Option #2 Modify your Web Client (default.ica):
   1. Logon to the server hosting your web interface
   2. Navigate to your default.ica file, normally located in the following directory > C:\Inetpub\wwwroot\Citrix\MetaFrame\conf
   3. Locate default and copy it to the desktop or some place where you can open in notepad.
   4. At the bottom of [Application] add the following > "Compress=Off" (without the quotes)
   5. See attached file (compression-default.txt) for an example defalt.ica file.