After installing the Quest Web Parts for SharePoint, any Microsoft Office document in the SharePoint document library or list would prompt for authentication every time.
Title
INTERNAL: Opening any Microsoft Office document in SharePoint prompts for re authenticationDescription
Cause
This is an issue with the Microsoft Office 2007 and Microsoft Vista Operating system.
Resolution
The issue gets resolved when the following patch from Microsoft is installed:-
http://support.microsoft.com/kb/907306
Defect ID
This is an issue with the Microsoft Office 2007 and Microsoft Vista Operating system.