Thu, Nov 28 2013 at 5:17 pm #16582
Hello Ha,
Are your overseas users using Outlook 2007 or 2010, by any chance? If so, then an easy fix may be to update their software to the latest version. According to this article:
http://community.office365.com/en-us/wikis/exchange/2444.aspx
Microsoft fixed some password notification-related bugs in those Outlook versions.
Let us know,
Tim