Persmission System not working

Hello together,

I require some help I don't get my answer from forum, google or elswhere (D*mn, feels like I am the only person with this issue)

We installed OMV 5 in beginning 2022 and Upgraded to OMV 6 in September.

Since our Server turns off at 8pm and turns on at 6am, also that night the Server turned off.

After runing on, it seemed, all non admin users (about 10) could not access any SMB hared folder except of their Home Directory.
After messing around almost 2 Weeks with the Permission system, I finally gave up. I can not use any ACL for now.
I make Updates every monday but even after a restart, the Issues becomes more and more complicated since everyone has access to everythin already but still cannot access it.

Is there a Script/Way to "reset" the PErmission table or maybe "fix" it?

This Post is my last hope. Otherwise I see no future using OMV for our companie

Thanks in advance for your help
Maulwurfn

Explaining the PErmission System how it should be for us:

Groups:
Each user has users by default
For each Set of shares we need to set groups (IT, HR, Management...)
Each Group has access to the specific Directories (IT to all, Management to HR and Management, HR to HR ...)
There are Special Groups for Special Shares.
Some IT Guys (me) have sudo and administrative priveleges. 

Example how the System behaves



My User is called foo.bar
foo.bar has group users and employee aswell special-group1

foo.bar cannot access X:\usserspermissionfolder\ even though he has the right permissions
foo.bar cannot access X:\special-group-folder\ even though he has the right permissions

Now I revoke all, groups except of users

foo.bar can now access all folders in X:\ - Even those he might not access

Now I decline access to X:\IT\ in User-Settings

foo.bar relogs and... Can still Acess X:\IT

Tree of Structure

X [users]:
|
-- IT [IT - Everyone Else blocked]
     |
     -- Secret Stuff 1
     -- Installers...
-- Management [Management, IT]
     |
     -- Contracts
         |
         -- Sharon please fire the IT guy.txt
     |
     -- ...


H [Home Directory, no further Issues here]:

This made the issue worse.

We decided to use another product, with a working permisson System.

Thanks