"Offline material present in this export" - How do I find the corresponding clips?

On export of a bigger project Premiere shows the following message:

"Offline material is present in this export and has online proxies attached. Offline material will be encoded using the proxies."

I managed to find and replace one clip where for some reason Premiere didn't want to switch back from Proxy to the original material (even though the original was still in the same place in the project folder. Importing it again and reinserting it in the timeline solved the problem), but the message is still being displayed, so I'm guessing there might be more clips with the same issue.
I made the mistake to render some of the proxies without a watermark, so it is not that easy to find them just by watching the film.

Is there a fast way to find the corresponding files?

And to the Adobe Team: Why, if Premiere clearly has the information (how else would it decide to display the error message?) is it not showing to me right away, which material it is referring to. Seems like a mistake to me, that is easy to fix. For example by adding the timecodes, or names of the material in question to the error message.