root@addc-01:~# samba-tool gpo aclcheck -U administrator Password for [EXAMPLE\administrator]: ERROR: Invalid GPO ACL O:DAG:DAD:PAI(A;OICI;0x001f01ff;;;DA)(A;OICI;0x001f01ff;;;;EA)(A;OICIIO; 0x001f01ff;;;CO)(A;OICI;0x001f01ff;;;DA)(A;OICI;0x001f01ff;;;SY)(A;OICI;0x001200a9;;;ED)(A;OICI;0x001200a9;;;S-1-5-21-1129951053-411964844-750776748-1105)(A;OICI;0x001200a9;;;DC) on path (example.net\Policies\{B30A27B8-8221-42B7-BA9F-BC6D2E9D7227}), should be O:DAG:DAD:PAR(A;OICI;0x001f01ff;;;DA)(A;OICI;0x001f01ff;;;EA)(A;OICIIO; 0x001f01ff;;;CO)(A;OICI;0x001f01ff;;;DA)(A;OICI;0x001f01ff;;;SY)(A;OICI;0x001200a9;;;ED)(A;OICI;0x001200a9;;;S-1-5-21-1129951053-411964844-750776748-1105)(A;OICI;0x001200a9;;;DC)