Mandatory comment field

Document ID : KB000016302
Last Modified Date : 14/02/2018
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I am trying to create a survey where the user should be required to enter some text into a *comment text box* to be able to send in the survey. Is this possible? I am only able to make the radio button part required.

CA Service Desk Manager 14.1CA Service Desk Manager 17.0

Out of the box this is not possible.