Add fields to Attachments table

Arpa_PiemonteGeoportal_Team

I  need to add some fields to better describe each single attachments (ie "title", "description", acquisition date" etc).

I tryed to add this fields to the attachments table   but no client (agol viewer, editor widget in WAB) seems to recognize these fileds.

Is there a way to customize attachments so they can be edited inside web applications?

ciao
Enrico

Arpa_PiemonteGeoportal_Team

Thank you Xander , I  used ArcMap 10.5 to add fields and to  republish the service.

Shoud i Try with ArcGIS Pro?