getent group returns only few groups on solaris

I was curious how you were able to get around the problem with the
formatting of nsswitch .conf? Like you I have used:

passwd		files winbind
groups		files winbind

But I get the following:

# rlogin -l DOMAIN+username machine name
Supported configurations for passwd management are as follows:
	passwd:	files
	passwd:	files ldap
	passwd:	files nis
	passwd:	files nisplus
	passwd:	compat
	passwd:	compat AND
	passwd_compat:	ldap OR
	passwd_compat:	nisplus
Please check your /etc/nsswitch.conf file
Password:
Mark Taylor 
IT Division, Office of Infrastructure