In the ICDm Console, when viewing a file and select the action to Quarantine the file, the computer selection page loads, showing 25 systems on the first page. If using the checkbox at the top of the checkbox column, all systems on the page are selected. When clicking the next page and clicking to select all systems in the second page, the first page deselects.
The results will provide up to 100 systems, by design. To view all 100 systems on the same page, browse to the bottom of the computer selection page and switch the number per page to 100. This will show all systems and allow the select all checkbox to select all available systems.