Have you noticed that if you run a User Activity Report on your TMG firewall that contains user names with accented characters that the report will end up blank?
The good news is that there is a fix.
Check it out on the TMG Firewall Team blog over at http://blogs.technet.com/b/isablog/archive/2012/01/30/blank-user-activity-report-if-domain-or-username-contains-accented-characters.aspx
DEBRA LITTLEJOHN SHINDER
MVP (Enterprise Security)