OU not listed in ECP

Team,

I have more than 10,000 ou in AD but all are not visible in ECP. After making the changes also i cant able to view all the OU.

Please help to know what is teh maximum value we can set in webconfig file or what is the work arround solution if we want to view all 10,000 + ou in ECP.

Value changed in webconfig file

    <!-- allows the OU picker when placing a new mailbox in its designated organizational unit to retrieve all OUs - default value is 500 -->

    <add key="GetListDefaultResultSize" value="11000" />​