On my desktop workstation, I have my Outlook contacts sorted by the "Category" header field. This is essential for grouping contacts associated with different projects (I have 1400+ business contacts, and couldn't possibly remember all their names). On my old Blackberry, my synced contacts were organized the same way (by "Category"). On my new Nokia Lumia 920, it seems I can only sort my synced contacts by either last name or first name. Hopefully I'm missing something, as this seems like an enormous failure for business use. Any help is greatly appreciated.