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A bitfield that dictates how the object is instantiated on a particular server. The value of this attribute can differ on different replicas even if the replicas are in sync.
This attribute can be zero or a combination of one or more of the following values.
| Value | Description | 
|---|---|
| 0x00000001 | The head of naming context. | 
| 0x00000002 | This replica is not instantiated. | 
| 0x00000004 | The object is writable on this directory. | 
| 0x00000008 | The naming context above this one on this directory is held. | 
| 0x00000010 | The naming context is in the process of being constructed for the first time by using replication. | 
| 0x00000020 | The naming context is in the process of being removed from the local DSA. | 
| Entry | Value | 
|---|---|
| CN | Instance-Type | 
| Ldap-Display-Name | instanceType | 
| Size | 4 bytes. | 
| Update Privilege | This value is set by the schema administrator. | 
| Update Frequency | When the object is created. | 
| Attribute-Id | 1.2.840.113556.1.2.1 | 
| System-Id-Guid | bf96798c-0de6-11d0-a285-00aa003049e2 | 
| Syntax | Enumeration | 
Implementations
- Windows 2000 Server
 - Windows Server 2003
 - ADAM
 - Windows Server 2003 R2
 - Windows Server 2008
 - Windows Server 2008 R2
 - Windows Server 2012
 
Windows 2000 Server
| Entry | Value | 
|---|---|
| Link-Id | - | 
| MAPI-Id | 0x80BD | 
| System-Only | True | 
| Is-Single-Valued | True | 
| Is Indexed | False | 
| In Global Catalog | True | 
| NT-Security-Descriptor | O:BAG:BAD:S: | 
| Range-Lower | - | 
| Range-Upper | - | 
| Search-Flags | 0x00000008 | 
| System-Flags | 0x00000012 | 
| Classes used in | Top | 
Windows Server 2003
| Entry | Value | 
|---|---|
| Link-Id | - | 
| MAPI-Id | 0x80BD | 
| System-Only | True | 
| Is-Single-Valued | True | 
| Is Indexed | False | 
| In Global Catalog | True | 
| NT-Security-Descriptor | O:BAG:BAD:S: | 
| Range-Lower | - | 
| Range-Upper | - | 
| Search-Flags | 0x00000008 | 
| System-Flags | 0x00000012 | 
| Classes used in | Top | 
ADAM
| Entry | Value | 
|---|---|
| Link-Id | - | 
| MAPI-Id | 0x80BD | 
| System-Only | True | 
| Is-Single-Valued | True | 
| Is Indexed | False | 
| In Global Catalog | True | 
| NT-Security-Descriptor | O:BAG:BAD:S: | 
| Range-Lower | - | 
| Range-Upper | - | 
| Search-Flags | 0x00000008 | 
| System-Flags | 0x00000012 | 
| Classes used in | Top | 
Windows Server 2003 R2
| Entry | Value | 
|---|---|
| Link-Id | - | 
| MAPI-Id | 0x80BD | 
| System-Only | True | 
| Is-Single-Valued | True | 
| Is Indexed | False | 
| In Global Catalog | True | 
| NT-Security-Descriptor | O:BAG:BAD:S: | 
| Range-Lower | - | 
| Range-Upper | - | 
| Search-Flags | 0x00000008 | 
| System-Flags | 0x00000012 | 
| Classes used in | Top | 
Windows Server 2008
| Entry | Value | 
|---|---|
| Link-Id | - | 
| MAPI-Id | 0x80BD | 
| System-Only | True | 
| Is-Single-Valued | True | 
| Is Indexed | False | 
| In Global Catalog | True | 
| NT-Security-Descriptor | O:BAG:BAD:S: | 
| Range-Lower | - | 
| Range-Upper | - | 
| Search-Flags | 0x00000008 | 
| System-Flags | 0x00000012 | 
| Classes used in | Top | 
Windows Server 2008 R2
| Entry | Value | 
|---|---|
| Link-Id | - | 
| MAPI-Id | 0x80BD | 
| System-Only | True | 
| Is-Single-Valued | True | 
| Is Indexed | False | 
| In Global Catalog | True | 
| NT-Security-Descriptor | O:BAG:BAD:S: | 
| Range-Lower | - | 
| Range-Upper | - | 
| Search-Flags | 0x00000008 | 
| System-Flags | 0x00000012 | 
| Classes used in | Top | 
Windows Server 2012
| Entry | Value | 
|---|---|
| Link-Id | - | 
| MAPI-Id | 0x80BD | 
| System-Only | True | 
| Is-Single-Valued | True | 
| Is Indexed | False | 
| In Global Catalog | True | 
| NT-Security-Descriptor | O:BAG:BAD:S: | 
| Range-Lower | - | 
| Range-Upper | - | 
| Search-Flags | 0x00000008 | 
| System-Flags | 0x00000012 | 
| Classes used in | Top |