I am happy to announce Outlook Integration Update for Microsoft Dynamics NAV 5.0. This update is now available for you to download at PartnerSource login credentials are required off course .
The Outlook Integration update rollup corrects the issues that are described in KB article number 945879. Apply the Outlook Integration update, following recommendations in the Installation & Setup Whitepaper included in the package, only to systems that are experiencing these specific problems. This update applies to Microsoft Dynamics NAV for all countries and all language locales.
From the link above Microsoft has released:
Does anybody know why they changed Codeunit 418, 448, 449.
I couldn't find anything in the whitepaper or website why they changed the objects.