If so, how did you do it?
I used the Export function within ArcMap 10.5 and while ArcMap could "see" the files it created, neither Windows nor my Mac could locate the files within the directory where the exported AI files were supposedly created. I am referring to both operating systems because I am running the emulator software Parallels on a Mac, which in turn enables me to run Windows and hence, ArcGIS 10.5.
Experience has taught me that the ArcMap 10.3 was the last and only version that exported smoothly to Illustrator and for that reason I continue to use it rather than opt for upgrading to 10.5. If not for the export problem, I would update my software to ensure that the version I use on my personal desktop computer is concurrent with the version being used at school.