Good Morning All, I am currently migrating my Windows NT and Exchange 5.5 to AD and Exchange 2003 and would like to ask some questions which I hope will be answer and thus make my life easier. I was having a Windows NT and Exchange 5.5 with OWA SSL with the OWA server in the DMZ of a Cisco PIX firewall. The OWA is on the DMZ and currently cannot be authenticated by the AD and would like to know which ports do I need to open on the PIX in order for the authentication to take place. This will help me have users out in the internet to check their mails while on travel through the OWA box. If anyone can help I would be very appreciative. Regards Thomas Kamire Systems Engineer Kenya Airways Ltd Ext.: +254 (20) 6422311 Tel: +254 722 483253 / 499884 DISCLAIMER: This message and any attachments are confidential and may be legally privileged or otherwise protected from disclosure. Although the necessary precautions have been taken, Kenya Airways does not accept legal responsibility for any damage whatsoever that is caused by viruses being passed or for the contents of this message. This message, and any attachments, are intended solely for use by the named addressee. If you are not the intended recipient, you must not copy them or disclose their contents to any other person. If you have received this message in error, please notify the sender by return e-mail and delete any attachments accompanying it immediately. "PLEASE NOTE THAT OUR OPERATOR NUMBER HAS CHANGED TO - +254-20-642 2000"