We found many complaints in internet forums that KB946983 causes various problems with Microsoft Outlook. We were able to reproduce some of them and we reported them to Microsoft. Microsoft update KB946983 has possible problems and we recommend it shouldn't be installed until it will be fixed by some other update. We also found these problems are caused also by a newer version of this update - KB952142.
In order to resolve these problems follow one of these suggestions:- Microsoft released official update to address this problem named KB 950282 - Description of the Office Outlook 2007 hotfix
package: March 20, 2008. It can be found at http://support.microsoft.com/default.aspx?scid=kb;EN-US;950282. However this update still cause similar problem and we recommend to not use it / uninstall it from your client machine. Contact Microsoft Customer Support center at http://support.microsoft.com/contactus/?ws=support to get appropriate update. Provide them with KB ID to point this issue.
- According to following Microsoft's bulletin http://www.microsoft.com/technet/security/Bulletin/MS08-015.mspx, Outlook 2007 with Service Pack 1 isn't affected by security error which is solved by the update KB946983. So users which are using Microsoft Outlook 2007 can use following workaround:
- Install Service Pack 1 for Outlook 2007.
- Remove security update KB946983 and security update KB952142.
