"Combing files in Acrobat..." is not combining .HEIC files
Working on Windows 10 Enterprise, Version 1803, OS Build 17134.523
Acrobat Pro DC, Version 2019.010.20069
When combining a list of files, Acrobat will not actually combine the file type HEIC. Everything else is combined but there is no indication in Acrobat that it left the HEIC files out. When combining dozens of files, it is easy to miss this issue.The "Files" attachment shows two PDF's and an HEIC file that need to be combined. When I select all, right click, "Combine files in Acrobat...", I get the results in the "Results" attachment. All that appears is the two PDF's.
Acrobat does not support .Heic files. In case, you want to combine it, you can print it to PDF from native application and then combine it.