http://blogs.technet.com/b/ucedsg/archive/2010/02/22/how-can-i-prevent-students-from-iming-executive-management.aspxThis was a question from a school district in Illinois. They wanted to prevent the students, hosted in OCS, from finding management via a search in OCS and accidently IMing/video chatting with them. &#160; There is an ethical wall sample script writtenen-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)http://blogs.technet.com/b/ucedsg/archive/2010/02/22/how-can-i-prevent-students-from-iming-executive-management.aspx#3322363Wed, 31 Mar 2010 16:44:02 GMTd5e57398-b9ef-4490-9955-07cbb4e4a80d:3322363markga<p>mslin,</p> <p>It provides basic isolation based on which OU you belong to and it will hide users if you are not a part of that OU. I am not familar with the latest HMC 4.5 hosted offering so I cannot say what you will lose from an isolation perspective.</p> <div style="clear:both;"></div><img src="http://blogs.technet.com/aggbug.aspx?PostID=3322363" width="1" height="1">http://blogs.technet.com/b/ucedsg/archive/2010/02/22/how-can-i-prevent-students-from-iming-executive-management.aspx#3322335Wed, 31 Mar 2010 14:42:15 GMTd5e57398-b9ef-4490-9955-07cbb4e4a80d:3322335mslin<p>Hi markga:</p> <p>If we install the &nbsp;ethical wall sample script in our ocs 2007, we can limit the user to IM or VOIP or search all user base on different Organizational Units, right?</p> <p>If that script can do that, we don't need to use the HMC 4.5 to limit the the user to IM or VOIP or search all user, right?</p> <div style="clear:both;"></div><img src="http://blogs.technet.com/aggbug.aspx?PostID=3322335" width="1" height="1">