I think I may know what you're meaning. We've made this modification to our own system. We wound up changing the existing date column to due date instead of adding a due date column but it should be relatively similar.This blog post, although old, helped me get pointed in the right direction.https://www.andrewbennett.com.au/2014/11/osticket-1-9-4-show-due-date-column/The file you want to modify for the agent side is /include/staff/tickets.inc.php. I would post just my code changes but I can't seem to figure out how to format it as code in the response (it's late). I have a test setup on 1.9.12 that I modified this way. I attached the entire tickets.inc.php as a text file if you want to take a look. I'm by no means a php expert so there are probably some errors in here but it seems to work fine. I use Notepad++ and use the compare plugin to easily see the difference between this and the unmodified code.Hopefully that helps!
[tickets.inc.php.txt](https://forum.osticket.com/assets/files/migrated/FileUpload/ff/e9ab970d0e7a8f7e93dafe44399a9c.txt)
