We do not support the functionality of setting the users preferences as an admin. You can extend the app yourself to add this feature, or our Professional Services could also assist.
Is this option available now in SBS Jive 4.5 + or still we need custom development?
You can't change them directly, but a lot of the preferences are based on system defaults, so the following things can be modified at a system level, which will then change the defaults for users:
User Locale Preference: defaults to system locale, change via admin console --> system --> management --> locale
Time Zone Preference: defaults to system time zone, , change via admin console --> system --> management --> locale
It appears that you can't configure the default watch settings via the admin console or the API. I created an issue for that here: