The problem is ldap server has limitation for the user about numbers of entries searched.

Open your directory server (name), Configuration Folder, Performance. On right panel check Client Control folder. You may see:

Size limit

Look-through limit

Time limit

Idle timeout

The look-through limit specifies the maximum number of entries that will be examined for a search operation.

The size limit specifies the maximum number of entries the server returns to the client application in response to a search operation.

The time limit specifies the maximum time the server spends processing a search operation.

The idle timeout specifies the time a client connection to the server can be idle before the server drops the connection.

Change these options to “unlimited” can resolve this problem.