For files, folders and users name, we need to use U+10000 - U+10FFFF in Unicode characters.
Today, we can only use BMP in Unicode characters on Box.
However, Windows OS supports many Unicode characters(eg, emoji), besides BMP, so this can be a problem in data migration from a file servers to Box.
Also, in CJK, Unicode characters other than BMP are used in personal name, so we consider this to be a big issue.
We hope to have many Unicode characters available everywhere on Box.
takaaki kumagai commented
Perhaps you have addressed this issue?