Azure StorSimple VA limits

I was wondering if someone could comment on these StorSimple limits: "Max number of files per share" and "Maximum number of files per virtual array".

One of you clients currently has more than 2 million files (and growing) stored in local file storage. They would like to use StorSimple, but it's not clear about these limits - should we split these 2 million files into several file shares? What to do when 4mil files limit is reached? Add more SVA's?