You can definitely edit the choices of a custom dropdown attribute for ticketing (it sounds like that is what this is for?). As long as you are able to get to the Admin
page for the ticketing application which the attribute was created for, you will be able to follow the steps in this article
to make choice edits or additions.
The ticketing admin attributes page is accessible either via the Admin application in TDNext > Applications > [your ticketing application] > Attributes
or by going to the ticketing application in TDNext, clicking on the gear button in the upper right, select Admin, and go to Attributes.
As to your questions, from the Admin
area, you can remove, add, and edit the choices available in the dropdown selections of a custom attribute, even if you originally created that attribute from the custom form in the Service Catalog
Secondly, did you "delete" that field meaning you just removed it from the form? Or were you in the Admin
area for the ticketing application and deleted it there? If the second option, you would have to create the attribute again. If you just removed it from the form, it should still be available in the Attributes section of the ticket application in Admin
. As long as it is viewable in the ticket app's Admin
page, it should be able to be added back onto the form.
I hope this helps. If you have any further questions about custom attribute editing please let me know.