Hi Team, I am trying to get filtering by group on GPOs (with code on Linux, i.e. samba-tool etc.). While experimenting something went wrong and I ended up with broken dsalcs. samba-tool gpo aclcheck ERROR: Invalid GPO ACL O:DAG:DAD:(A;OICI;0x001f01ff;;;DA)(A;OICI;0x001200a9;;;ED)(A;OICI;0x001f01ff;;;EA)(A;OICI;0x001f01ff;;;DA)(A;OICI;0x001200a9;;;AU)(A;OICI;0x001f01ff;;;SY)(A;OICI;0x001200a9;;;ED)(A;OICI;0x001f01ff;;;EA)(A;OICI;0x001200a9;;;AU)(A;OICI;0x001f01ff;;;SY)(A;OICI;;;;WD)(A;;0x001f01ff;;;DA)(A;OICIIO;0x001f01ff;;;CO)(A;OICIIO;;;;CG) on path (example.com\Policies\{6AC1786C-016F-11D2-945F-00C04FB984F9}), should be O:DAG:DAD:P(A;OICI;0x001f01ff;;;DA)(A;OICI;0x001f01ff;;;EA)(A;OICIIO;0x001f01ff;;;CO)(A;OICI;0x001f01ff;;;DA)(A;OICI;0x001f01ff;;;SY)(A;OICI;0x001200a9;;;AU)(A;OICI;0x001200a9;;;ED) Since my GPOs are created by code, the simple solution for broken stuff is to remove it (samba-tool gpo del), fix the code and rerun. However at some point (don't know how it happened) I broke the dsacl of the "Default Domain Policy". On delete is complains: "ERROR(ldb): uncaught exception - LDAP error 53 LDAP_UNWILLING_TO_PERFORM" Ldbsearch shows "isCriticalSystemObject: TRUE", which is probably the cause of above error. The "Default Domain Policy" on the filesystem is empty. My setup is Samba 4.15.5 (from Louis) on Bullseye. Is there a way to fix / overwrite dsacls with a correct value, so that I do not need the delete/create operation? If not: what would be the way to fix the "Default Domain Policy"? - Kees