| Decimal | Bitmask | Code | Description |
|---|---|---|---|
| 1 | 0x00000001 | fATTINDEX | Create a Presence Index for the attribute. |
| 2 | 0x00000002 | fPDNTATTINDEX | Create an index for the attribute in each container. |
| 4 | 0x00000004 | fANR | Add this attribute to the Ambiguous Name Resolution (ANR) set. |
| 8 | 0x00000008 | fPRESERVEONDELETE | Preserve this attribute in the Tombstone object for deleted objects. |
| 16 | 0x00000010 | fCOPY | Copy the value for this attribute when the object is copied. |
| 32 | 0x00000020 | fTUPLEINDEX | Create a SubstringIndex for the attribute. This will improve searches where the wildcard appears at the front of the search string. For example, (sn=*mith). |
| 64 | 0x00000040 | fSUBTREEATTINDEX | Supported beginning with Windows Server 2008. Supported beginning with ADAM. Creates an index to greatly help Virtual List View Control (VLV) performance on arbitrary attributes. |
| 128 | 0x00000080 | fCONFIDENTIAL | Mark attribute as confidential. Ignored for when systemFlags=FLAG_SCHEMA_BASE_OBJECT. |
| 256 | 0x00000100 | fNEVERVALUEAUDIT | Specifies that Auditing of changes to individual values contained in this attribute MUST NOT be performed. Auditing is outside of the state model. |
| 512 | 0x00000200 | fRODCFilteredAttribute | Specifies that the attribute is a member of the Filtered Attribute Set. |
| 1024 | 0x00000400 | fEXTENDEDLINKTRACKING | Specifies a hint to the Domain Controller to perform additional implementation-specific, nonvisible tracking of link values. The behavior of this hint is outside the state model. |
| 2048 | 0x00000800 | fBASEONLY | Specifies that the attribute is ONLY returned by search operations that are a LDAP Search Scopes of BaseObject. Read operations that would otherwise return an attribute that has this search flag set instead fail with operationsError / ERROR_DS_NON_BASE_SEARCH. |
| 4096 | 0x00001000 | fPARTITIONSECRET | Specifies that the attribute is a partition secret. An extended access check is required. |