Can't Edit Text in Acrobat Pro DC

This is a pain in the ass for me too!

Our office now has the same problem.  Hasn't been a problem for years.  All of a sudden now we can't edit the text after it's initial creation. It seems to have JUST started a week ago.

Acrobat 9 Pro:

So turns out that text is really text objects that can be edited but you need the Illustrator program to do it . I have Adobe 9 and when I click on the last of the text editing tools - it lets me select the object - then I can right click and say edit object and It will open Illustrator. Then I just save after my text edits and the object is updated in the pdf file with my new edits. (Icon is a pencil in a text box) Touch up text object tool. This may have changed in a later version of Acrobat

There are different reasons why something that looks like text does not behave like text. The most common problem is that you are actually looking at an image or a picture of text. In this case, you can very likely (this depends on the quality of the image) run OCR and then after that you should be able to edit this text. The important thing here is to run OCR with the "Editable Text and Images" setting in the OCR settings. Otherwise you end up with text that is stored "behind" the original image.

If OCR does not work, chances are you are dealing with text that was converted to "outlines". In this case, the text was converted from true text (which you can edit) to vector drawings, that have nothing to do with text anymore (but still look like text). In this case, you are out of luck. Your only option in this case is to convert the complete page (or the complete documents) to a high resolution image file (e.g. a 600dpi TIFF image), and then import this image again into Acrobat (and therefore converting it to PDF), and then running OCR on that.