Thanks for helping me understand what this means. Do you want to say that this feature doesn't work if there is exchange cluster? Here is what i found, maybe can help you.<br><br><font size="2" color="black" face="Verdana,Arial,Helvetica"><font size="2" color="black" face="Verdana,Arial,Helvetica">-Create a Enterprise Root Microsoft Certificate Services on a W2K3 <br>
domain member server. <br>-Upload this root CA certificate to CUPS as a 'presence-trust' certificate. <br>-Add this root CA to your domain security group policy. push group <br>policy to the clients. <br>-Create a CSR on my <b style="color: black; background-color: rgb(255, 255, 128);">Exchange</b> box via IIS. Had this CSR signed by the <br>
enterprise root CA. <br>-Upload the signed cert back to IIS on <b style="color: black; background-color: rgb(255, 255, 128);">exchange</b>. restart iis. <br>-Configure CUPS presence engine for Outlook. The common name is the <br>
name of the presence-trust certificate as viewed in the CUPS OS admin <br>certificate page. <br>-Reboot presence. <br><br>Regards<br><br>Ratko<br></font></font><br><br>