We have a Lotus Domino server hosting some Microsoft Office documents. For improved security, I started using stunnel to redirect pacts from the HTTP servers via HTTPS. Everything works perfectly, however when a user clicks a document link they are prompted for login credentials or a certificate. This would seem to be because MS Office is trying to open the remote document in edit mode rather then downloading it locally or opening it in read mode. I've tried a number of stunnel configuration options but nothing seems to work. At current I am using the following simple configuration. Any insight into the issue would be appreciated.

cert = stunnel.pem

socket = l:TCP_NODELAY=1 socket = r:TCP_NODELAY=1 verify=0

[https] accept = 443 connect = localhost:80 TIMEOUTclose = 0