This policy setting allows you to increase the interval between background polls of a SharePoint site for changes to notebooks.
If you enable this policy setting, OneNote will poll SharePoint less frequently for changes to whole notebooks. Intervals are multiplied by the entered value, a positive integer value from 1 to 10. Larger intervals will slow notebook sync but reduce server load.
If you disable or do not configure this policy setting, OneNote will sync notebooks at the default rate (multiplier value of 1).
Note: This policy setting only applies to volume licensed versions of Office 2016 that use Windows Installer (MSI), such as Office Professional Plus 2016 and Office Standard 2016.