http://blogs.technet.com/b/ucedsg/archive/2010/04/22/enabling-ocs-integration-with-exchange-2010-im.aspxI was in Maryland this week and one of my customers wanted to know how to integrate OCS with Exchange for OWA Chat and Presence.&#160; To get Office Communication Server IM integration with Outlook Web Apps, we need to work on the following area: · Installen-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)http://blogs.technet.com/b/ucedsg/archive/2010/04/22/enabling-ocs-integration-with-exchange-2010-im.aspx#3415371Wed, 23 Mar 2011 18:19:17 GMTd5e57398-b9ef-4490-9955-07cbb4e4a80d:3415371missing lines in web.config<p>My web.config file on my Exch2010SP1 server is missing the IMPoolName, IMCertificateIssuer and IMCertificateSerialNumber. &nbsp;I tried coping and pasting them in to the bottom of the web.config file but it didnt work. &nbsp;What line number are those fields supposed to be on?</p> <div style="clear:both;"></div><img src="http://blogs.technet.com/aggbug.aspx?PostID=3415371" width="1" height="1">