Windows permissions - Can't find groups, but can find users

Hi,

I am using OMV 3.0.58 and have one little problem.
I created one SMB share for Windows client, where one can use Windows explorer to manage file system permissions. That is working fine with that SMB share settings:

Inherit ACLs activated
Inherit permissions activated
Store DOS attributes activated

And I additionally I added that extra options:

vfs objects = acl_xattr
map acl inherit = yes
hide unreadable = yes
inherit owner = yes

That works well, the only problem is, that windows explorer permission tool can't find any groups which I created on the OMV.
No user groups and also no system groups. I also restarted SMB and rebooted OMV + client, but did not help.
New users can be found immediately after creating and applying settings. Why groups not? Is that a bug or is that normal? Would be nice of groups could also be used for permission settings.
Do you think i have some wrong settings? But I tried now to create a new SMB share with default configs and have the same problem, groups can't be found

Zitat von subzero79

I don't believe you can change the ACL permissions from a simple samba login, unless the samba server was a domain controller and the login was the domain admin. Might be wrong...maybe @dethegeek can know better

It is working fine. I can add, remove and modify permissions in Windows Explorer and they don't get lost. I connect in Windows as normal user, don't have a domain controller, just a workgroup.

Zitat von subzero79

What happens if you try to add a user? do it allow it? if you go terminal does it show the ACL this time?

Yes, I can add a user without problems. The user is found and can be added. That's why I am wondering, why groups are not found.
Which command do I have to run to show you the requested ACL output?

The ACL window in OMV shows exactly that what I did set through Windows Explorer and also gets updated, when I change something through Windows Explorer and also vice versa:

Where can I find the folder via SSH?
I looked in /mnt and it's empty and I can't access /dev/sdb1 cause it's no folder

Edit: My windows user which I use to connect to the share is set as the owner of the shared folder. Maybe that's the reason, why I am able to change permissions through Windows Explorer?