Novell GroupWise Mobility Service 2014 R2 Support Pack 1
Device Security Policy enabled checked
Minimum password length checked and set to 4 characters
Inactivity Time checked and set to 10 minutes
iOS devices prompt for the pass code however it won't work with 4 characters. It seems to only work when you use 6 or more. Android devices seem to works fine.
This is an issue with the device. To make trigger it to allow the 4 characters, make any change to the security policy, save and restart GMS. Then go in and change the setting back, save and restart GMS. Once the device connects again, it should prompt for the 4 digit code.