WHY IS THAT??? GRRR!!! It works on Exchange 2003 like a charm! I have users' display names in national language and SimpleDisplayName filled in latin characters. Everywhere in the intranet AD display name is used, but when message leaves the organisation it is substituted to SimpleDisplayName. It is VERY useful! But from the very beginning of Exchange 2007 this feature is ignored! My only hopes were that SP1 will solve this issue. BUT NO! I have applied SP1 in my test box today and what I see?... Nothing! Could somebody help to solve this?