I have Exchange installed already and want to enable Outlook Web Access. Is there an order in regard to installing IIS 3 before installing Exchange or IIS before going back and installing the Outlook Web program. <br>Quessing I want to install IIS and then go through the Exchange install program and install the Outllook Web Access feature. Does it matter.<br><br>Also, if I put both of these on the same server do I have to enable or disable Microsoft's Challenge Response auth. Also, would I have to grant special NT permissions for domain users actually accessing their mailboxes through a web browser. I know you can set permissions in IIS put if both IIS and Exchange are setting on a NT member server will the users run into permission problems because they are logging into the NT machine.<br><br>Thank you in advance for your advice.