How to add FreeBSD users/groups with whitespaces in the name, so NFSv4 and SAMBA can use them?

Aurélien Couderc <[email protected]>
Newsgroups gmane.os.freebsd.devel.hackers
Message-ID <CA+1jF5o3hBkp_uPBTEyVva+S1DGMB6jNkvyU+Wb4WYf76=i4Lw@mail.gmail.com>
Both SAMBA and NFSv4 have to deal with user and group names with
<space> in their strings.
Common example is the Windows/OSX "Domain Users".

Is there any solution in FreeBSD pw to add such groups and users?
Because pw groupadd group -n 'Domain_Users' -g 2016029 does not work.

Aurélien
-- 
Aurélien Couderc <[email protected]>
Big Data/Data mining expert, chess enthusiast
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