[Samba] Samba on Debian 8; NT4 domain, win10

[Stefan G. Weichinger]

NT4-PDC:

# net groupmap list
Domain Users (S-1-5-21-2940660672-4062535256-4144655499-513) -> users
Domain-Admins (S-1-5-21-2940660672-4062535256-4144655499-512) -> root
Klienten (S-1-5-21-2940660672-4062535256-4144655499-1010) -> klienten

User pl13 is member of group "Domain Users":

# pdbedit -Lv pl13
Unix username:        pl13
NT username:
Account Flags:        [U          ]
User SID:             S-1-5-21-2940660672-4062535256-4144655499-2026
Primary Group SID:    S-1-5-21-2940660672-4062535256-4144655499-513

This group seems not to be converted, see server after classic upgrade:

# net groupmap list
#

-> no groups

This puts all these users into some new group:

# pdbedit -L | grep pl

pl01:4294967295:
pl02:4294967295:
pl03:4294967295:
pl04:4294967295:
pl05:4294967295:

while on the old server this was:

# pdbedit -L | grep pl | sort

pl01:501:
pl02:502:
pl03:503:
pl04:504:
pl05:505:

Am I on the right track here?