Most big corps still use licensed WinZip, but we've had problems sending AES-encrypted-by-WinZip files to external MS Windows users because the built-in Windows Explorer dezipping algo can't handle AES.

The users double-click on the encrypted Zip file and receive some irrelevant error message ( 'could not create temp file' or thereabouts ).

So often one has to fall-back to the Zip encryption algo.