Finally, thanks to https://www.thewindowsclub.com/cant-access-shared-folder-because-of-organizations-security-policiesCan't access shared folder because of organization's security policies, I found a way to override this:
- From regedit
regeditgo to Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows,HKLM\SOFTWARE\Policies\Microsoft\Windows - Create a new key named LanmanWorkstation,
- InKey LanmanWorkstation create
LanmanWorkstationand within it a new DWORD names AllowInsecureGuestAuth and set itsnamedAllowInsecureGuestAuthwith value to 1,1 - Reboot,
- Enjoy.
Of course not to do without your company approval, I just did it to test but I'm working with our IT to see how we can manage this.