This language pack resolves three key issues some customers have experienced;
- Events being logged in the application log for any user not using en-us as their chosen language after installing SP2 RU1.
- A wording error in the German version of owa
- A wording error in the Dutch version of OWA
Note that Exchange 2010 Service Pack 2 included the full language pack, and if you are not experiencing the problems or have not installed any language packs post SP2 you do not need to apply this language