If you want to enter multi-byte data on the administration console pages, you need to be aware of the following issues:
If a file or directory name is to appear in a URL, it cannot contain 8 bit or multi-byte characters.
For email addresses, use only those characters permitted in RFC 17.000 (ftp://ds.internic.net/rfc/rfc17.000.txt). User ID and password information must be stored in ASCII.
To make sure you enter characters in the correct format for users and groups, use a UTF-8 form-capable client to input 8 bit or multi-byte data.