The scenario is this (in SharePoint Online):
I am trying to implement a search box, in our Intranet Page, that is connected to an external database. This is just a small DB with people's names, phone nr., office location, etc. Kind of like Corporate Phone-book.
Since the structure is already there, because it was used in the old html/php based Intranet Page, I would like to just add the Search box in our SharePoint Intranet, and connect it to this structure so that it can display result from there.
Another important factor: the result/s should be displayed in a pop-up window.
I have started with a "HTML Form Web Part". Any thought?