Overview#

OMSyntax is used as part of specifying the syntax of an attribute. See MS-ADTS section 3.1.1.2.2.2, LDAP Representation, for information on how this object is used by the Active Directory service.

Microsoft Active Directory uses three AttributeTypes that identify the syntax of the AttributeType:

• AttributeSyntax
• OMSyntax
• OMObjectClass (OPTIONAL)

OMSyntax is a REQUIRED INTEGER value for an AttributeType within Microsoft Active Directory which he XDS/XOM syntax.

LDAP (Microsoft Active Directory) Attribute Definition#

The OMSyntax AttributeTypes is defined as:

• CN:
• OID of 1.2.840.113556.1.2.231
• NAME: OMSyntax
• DESC:
• EQUALITY:
• ORDERING:
• SYNTAX: 2.5.5.9
• LOWERBOUND:
• UPPERBOUND:
• OMSyntax: 2
• SchemaIDGUID: bf9679ed-0de6-11d0-a285-00aa003049e2
• mapiID: 33022
• SINGLE-VALUE
• NO-USER-MODIFICATION
• USAGE: OperationalAttribute
• Extended Flags:
  • X-ORIGIN:
• X-SYSTEMFLAGS FLAG_SCHEMA_BASE_OBJECT
• X-SCHEMAFLAGSEx FLAG_ATTR_IS_CRITICAL
• X-SEARCH-FLAGS FPRESERVEONDELETE
• Used as MUST in:
• Used MAY in:

Version-Specific Behavior: First implemented on Windows 2000 Server operating system.

The schemaFlagsEx attribute was added to this attribute definition in Windows Server 2008 operating system.

More Information#

There might be more information for this subject on one of the following:

• AccountExpires
• AccountNameHistory
• AllowedAttributesEffective
• Assistant
• AttributeSchema
• AttributeSecurityGUID
• AttributeSyntax
• Boolean
• ClassDisplayName
• DefaultHidingValue
• DefaultObjectCategory
• DirectReports
• ExtendedCharsAllowed
• IA5String
• Integer
• IsDefunct
• IsEphemeral
• LinkID
• ManagedBy
• Manager
• MapiID
• Member
• Microsoft Active Directory Syntax
• MsDS-TrustForestTrustInfo
• MsDS-User-Account-Control-Computed
• NTDSDSA
• OMObjectClass
• OMSyntax
• ObjectGUID
• PosixAccount
• RdnAttId
• TokenGroups
• UnixHomeDirectory
• UsnChanged
• WhenChanged