OneNote labbook export and backup tool
You need to download the pdfsharp dll file from here: https://sourceforge.net/projects/pdfsharp/ and place it in the same folder than the export script.
In order to allow for loading of this dll file you need to right-click on the file and in the properties dialog click the "allow" button in the section "security".
Furthermore, execution of unsigned powershell scripts must be allowed in Windows by executing
Set-ExecutionPolicy Unrestricted
in a PowerShell with elevated rights (open PowerShell by right-clicking and selecting "run as administrator").
OneNote must run and a user with valid reading credentials on the notebook in question must be logged in.
To make the magic happen, you need to install the onenote-powershell adaptor. You can get the *.msi file for that from: http://cid-83dfdc4530b17dd8.skydrive.live.com/self.aspx/Open%20Source%20Projects/OneNotePowershell.msi
More details about the provider can be found here: https://bdewey.com/2007/07/18/onenote-powershell-provider/
The script now checks the date of the most recently exported summary file and exports all pages created after this date.
Furthermore the Schtasks command is used to schedule the execution of the script. In order to make this work you have to execute the following command once:
Schtasks /create /sc weekly /d sun /tn "Export Labbook" /tr "PowerShell -File [Path to Script]\ExportLabbook.ps1" /st 23:00:00
This will create a scheduled task called "Export Labbook" which will run every Sunday 23:00.