This setting is used in conjunction with "Silently sign in users to the OneDrive sync app with their Windows credentials." This setting lets you prompt users who have more than a specified amount of content in OneDrive to choose folders to sync during setup of the OneDrive sync app (OneDrive.exe).
If you enable this setting, users who have more content than the value you specify will be shown the Choose Folders dialog box by default during OneDrive Setup.
If you disable or do not configure this setting, when users set up the sync app, all files will be selected to sync.
Specify the tenant ID and the maximum size of a user's OneDrive before the user is prompted to choose the folders they want to sync.
In the Value name field, enter the tenant ID. In the Value field, enter the size.
Valid values are from 0 to 4294967295 MB (inclusive).