!!! Overview
[{$pagename}] is an [AttributeType] defined in [Draft-behera-ldap-password-policy] and used within several [LDAP Server Implementations]!! [Draft-behera-ldap-password-policy]
If pwdInHistory is present and its value is non-zero, the server checks whether this password exists in the entry's pwdHistory attribute or in the current password attribute.
If the password does exist in the pwdHistory attribute or in the current password attribute, the server sends a response message to the client with the resultCode: constraintViolation (19), and includes the passwordPolicyResponse in the controls field of the response message with the error: passwordInHistory (8).

If this attribute is not present, or if the value is 0, used passwords are not stored in the [pwdHistory] attribute and thus may be reused.

!! [LDAP] [Attribute] Definition
The [{$pagename}] [AttributeTypes] is defined as:
* [OID] of [1.3.6.1.4.1.42.2.27.8.1.4] 
* [NAME|Attribute-Name]: [{$pagename}]
* [DESC]: 
* [Supertype]: 
* [EQUALITY]: [IntegerMatch]
* [ORDERING]: []
* [SYNTAX]: [1.3.6.1.4.1.1466.115.121.1.27]
* [SINGLE-VALUE]
* [USAGE]: [UserApplications] 
* [Extended Flags]: 
** [X-ORIGIN]: [Draft-behera-ldap-password-policy]
* Used as [MUST] in:
** 
* Used as [MAY] in:
**

!! [eDirectory] [{$pagename}]
[{$pagename}] specifies the maximum number of used [passwords] stored in the [nspmPasswordHistory] [attribute]. 

If [{$pagename}] exists then the values of the [nspmPasswordHistoryLimit], the [nspmPasswordHistoryExpiration], and the [PasswordUniqueRequired] are ignored

!! More Information
There might be more information for this subject on one of the following:
[{ReferringPagesPlugin before='*' after='\n' }]