[Samba] Samba4 - Printer Drivers install fails

[Julien TEHERY]

https://wiki.samba.org/index.php/Setting_up_Samba_as_a_Print_Server#Supported_Print_Server_Back_Ends 

> Did you:
> # net rpc rights grant "SAMDOM\Domain Admins" SePrintOperatorPrivilege -U "SAMDOM\administrator"
>
> Greetings
> Daniel


Yes of course, as i explained before, I'm allready able tu manage 
printers and upload drivers through MMC to my cups pint server.

Only some drivers fail to install with this (paradoxal) error:


_pre_vista_2] to [x64/3/DriverInstall_Pre_Vista_2]: 
NT_STATUS_OBJECT_NAME_NOT_FOUND
[2019/11/21 15:38:50.695414,  0] 
../source3/rpc_server/spoolss/srv_spoolss_nt.c:8612(_spoolss_AddPrinterDriverEx)
   _spoolss_AddPrinterDriverEx: move_driver_to_download_area failed - 
WERR_ACCESS_DENIED


As I'm allready able to upload/install x64 drivers, how could I have a 
permission issue?