!!! Overview
[{$pagename}] can be used to view and modify the [LDAP policy in Active Directory]

!! [Example]
As an example, modifying the [MaxPageSize] limit using Ntdsutil.exe. You would:

There is a [maxPageSize] limit of 1000 in the windows AD which limits the [LDAP] query records to a max of 1000. In simple words whenever an LDAP search or query is made to the AD, no more than 1000 records are returned from the directory. This limitation is actually a security design so as to prevent the [Microsoft Active Directory] from [Denial-of-Service] attacks for [LDAP] queries. In case less than 1000 users are defined in the AD, no additional work is required but for a large setup this limit needs to be changed at the AD using the [{$pagename}] utility. So the following steps need to be done at your AD to change the [MaxPageSize] value from 1000 to 3000.

{{{
C:> ntdsutil
ntdsutil: ldap policies
ldap policy: connections
server connections: connect to server LAURA
Binding to LAURA ...
Connected to LAURA using credentials of locally logged on user.
ldap policy: show values

Policy                          Current(New)

MaxPoolThreads                  4
MaxDatagramRecv                 4096
MaxReceiveBuffer                        10485760
InitRecvTimeout                 120
MaxConnections                  5000
MaxConnIdleTime                 900
MaxPageSize                     1000
MaxQueryDuration                        120
MaxTempTableSize                        10000
MaxResultSetSize                        262144
MaxNotificationPerConn                  5
MaxValRange                     1500

ldap policy: set MaxPageSize to 3000
ldap policy: Show Values

Policy                          Current(New)

MaxPoolThreads                  4
MaxDatagramRecv                 4096
MaxReceiveBuffer                        10485760
InitRecvTimeout                 120
MaxConnections                  5000
MaxConnIdleTime                 900
MaxPageSize                     1000(3000)
MaxQueryDuration                        120
MaxTempTableSize                        10000
MaxResultSetSize                        262144
MaxNotificationPerConn                  5
MaxValRange                     1500

ldap policy : commit changes
ldap policy : q
ntdsutil : q
}}}
After performing above commands LDAP can successfully return more than 1000 users from the AD. 

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