if you a getting this error when configuring you iPhone/iPod, then it seems you have a bad Apple.xml file.
check HOST tag, it should contain full path to the servlet.
see sample on http://www.vlaad.lv/lotus.nsf/dx/how-to-forse-lotus-traveler-use-alternative-ssl-port
good practice is always have a backup of Apple.xml file, before you do any configuration.
I decided to postit in a blog, as I didn't found solution in support/google :)
I hope this would help someone :)
vlaad
====================== ERROR ==============================
An Error occured while contacting server
Error DomainÚErrorDomain Code=0 "Operation could not be completed." (DAErrorDomain error 0.)"
OK
Vladislav Tatarincev January 4 2010 05:46:53 PM
Great job,
thanks you for the tips, we have our domino server behind a reverse proxy server, and we were unable to activate any Iphone with HTTPS (with the same error as you).
Now it's works very well.
Thanks,
marlec.