Domain Users not shown in users at admin tools

Hello,

I have small problem about users from domain

after Authentication with domain everything working fine

but i found when going to users at admin tools show only users in alfresco but the domain users can log on in alfresco fine and groups in domain shown in groups at admin tools fine.

so is there any one can help me and tell me where is the problem and why domain users not shown in users at domain tools when search on it ?

i think the problem in this code is this right ? my organization unit is "alfresco" so i think i need to tell the alfresco search on users in it. i have tried to use CN=user accounts or user_accounts but not working too

ldap.synchronization.userSearchBase=OU=alfresco,DC=alahwany,DC=org