Does anyone know where this setting is stored ? (OF 1.8)

The most obvious candidate in the application Preferences collection would appear to be:

OFMTaskDefaultDueTimeDateComponents

but this seems to return missing value for value and default.

Have also tried looking at the output of defaults read com.omnigroup.OmniFocus in the shell, but it looks as if I am missing something.

--

[Ken Case]

It's stored as a synchronized database setting rather than a local device preference, so the setting will be the same on all devices.

It's the DueSoonInterval setting, measured in seconds. (Though, come to think of it, we should change it to use interval strings like "2d" instead so that it handles daylight savings time transitions better.)

Aha ! Thank you, Ken.

Just in case this is helpful to anyone, although the settings collection of a document does not currently respond to a request for 'every setting', you can get the due soon value with:

tell application "OmniFocus"
	tell default document
		(value of setting id "DueSoonInterval") / days as integer
	end tell
end tell