a-samaccountname.md

title	description	ms.assetid	ms.tgt_platform	keywords	topic_type	api_name	api_type	ms.topic	ms.date
SAM-Account-Name attribute	The logon name used to support clients and servers running earlier versions of the operating system, such as Windows NT 4.0, Windows 95, Windows 98, and LAN Manager.	dc661e59-9a36-4d2b-93f0-f88edf7efd66	multiple	SAM-Account-Name attribute AD Schema sAMAccountName attribute AD Schema	apiref	SAM-Account-Name	Schema	reference	05/31/2018

SAM-Account-Name attribute

The logon name used to support clients and servers running earlier versions of the operating system, such as Windows NT 4.0, Windows 95, Windows 98, and LAN Manager.

This attribute must be 20 characters or less to support earlier clients, and cannot contain any of these characters:

• "/ \ [ ] : ; | = , + * ? < >

Entry	Value
CN	SAM-Account-Name
Ldap-Display-Name	sAMAccountName
Size	20 characters or less.
Update Privilege	Domain administrator
Update Frequency	This value should be assigned when the account record is created, and should not change.
Attribute-Id	1.2.840.113556.1.4.221
System-Id-Guid	3e0abfd0-126a-11d0-a060-00aa006c33ed
Syntax	String(Unicode)

Implementations

• Windows 2000 Server
• Windows Server 2003
• Windows Server 2003 R2
• Windows Server 2008
• Windows Server 2008 R2
• Windows Server 2012

Windows 2000 Server

Entry	Value
Link-Id	-
MAPI-Id	-
System-Only	False
Is-Single-Valued	True
Is Indexed	True
In Global Catalog	True
NT-Security-Descriptor	O:BAG:BAD:S:
Range-Lower	0
Range-Upper	256
Search-Flags	0x0000000D
System-Flags	0x00000012
Classes used in	Security-Principal

Windows Server 2003

Entry	Value
Link-Id	-
MAPI-Id	-
System-Only	False
Is-Single-Valued	True
Is Indexed	True
In Global Catalog	True
NT-Security-Descriptor	O:BAG:BAD:S:
Range-Lower	0
Range-Upper	256
Search-Flags	0x0000000D
System-Flags	0x00000012
Classes used in	Security-Principal

Windows Server 2003 R2

Entry	Value
Link-Id	-
MAPI-Id	-
System-Only	False
Is-Single-Valued	True
Is Indexed	True
In Global Catalog	True
NT-Security-Descriptor	O:BAG:BAD:S:
Range-Lower	0
Range-Upper	256
Search-Flags	0x0000000D
System-Flags	0x00000012
Classes used in	Security-Principal

Windows Server 2008

Entry	Value
Link-Id	-
MAPI-Id	-
System-Only	False
Is-Single-Valued	True
Is Indexed	True
In Global Catalog	True
NT-Security-Descriptor	O:BAG:BAD:S:
Range-Lower	0
Range-Upper	256
Search-Flags	0x0000000D
System-Flags	0x00000012
Classes used in	Security-Principal

Windows Server 2008 R2

Entry	Value
Link-Id	-
MAPI-Id	-
System-Only	False
Is-Single-Valued	True
Is Indexed	True
In Global Catalog	True
NT-Security-Descriptor	O:BAG:BAD:S:
Range-Lower	0
Range-Upper	256
Search-Flags	0x0000000D
System-Flags	0x00000012
Classes used in	Security-Principal

Windows Server 2012

Entry	Value
Link-Id	-
MAPI-Id	-
System-Only	False
Is-Single-Valued	True
Is Indexed	True
In Global Catalog	True
NT-Security-Descriptor	O:BAG:BAD:S:
Range-Lower	0
Range-Upper	256
Search-Flags	0x0000000D
System-Flags	0x00000012
Classes used in	Security-Principal