remove send as from delegation permissions

Hi,

it seems send as check box is delegated to users when you give them manage account permission on an OU

but this is not good and i do not want them to be able to use this and send email on behalf of that OU users in an exchange 2010 organization

but there is not a single check box for removing this entry (people with delegation should not be able to enable or disable this)

any way ?

i should add that i have used the .inf file to increase these rights to 70 but no separate setting for removing this is available

<cite>technet.microsoft.com/en-us/library/cc772784(v=ws.10).aspx</cite><a data-ci="srslc_0" data-desc="Appendix O: Active Directory Delegation Wizard File. Updated: ... Navigate to the \Inf folder. Back up the ..." data-slg="webres" data-sli="srsl_0" data-title="Appendix O: Active Directory Delegation Wizard File" data-url="http://technet.microsoft.com/en-us/library/cc772784(v=ws.10).aspx" data-ved="0CEMQ5hkwAA" data-vli="srslcl_0" id="srsl_0" role="button" tabindex="0">