Microsoft released a fix (kb2677598) for a small cosmetic imperfection which shows up when using Outlook Web Access in Dutch, after installing Service Pack 2 on Exchange 2010.
Instead of showing up “Mail”, OWA displayed “Globale Adreslijst” (Global Addresslist) which might be confusing to end users.
To implement the hotfix, you need to apply hotfix kb2677598 on your Exchange 2010 SP2 Client Access Servers.
You can download the Microsoft Exchange Server 2010 SP2 Language Pack Bundle (219 MB) here.
(Special thanks to Jetze for the heads-up)