When you click a hyperlink to open a Microsoft Office OneNote 2007 notebook or a Microsoft Office OneNote 2003 notebook that is located in a Microsoft Windows SharePoint Services document library, Microsoft OneNote opens the file as a read-only copy of the notebook.
This problem occurs because Microsoft Internet Explorer does not have a defined MIME type for Microsoft OneNote files that have the following file name extensions:
Therefore, Internet Explorer downloads a copy of the file to the Temporary Internet Files folder for Microsoft OneNote to open.
To work around this problem, you must create a hyperlink to the document library where the file resides and then open the file. To open the file, follow these steps:
Click the hyperlink to open the document library.
Click the arrow next to the notebook's name.
Click Edit in Microsoft Office OneNote.
This procedure opens the notebook in OneNote in a shared mode. Any changes that are made to the file are saved back to the file in the document library.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.