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

Comments (1)
Vladislav Tatarincev January 4 2010 05:46:53 PM

 Comments
1) Traveler config on alternative port, solution for Error Domain=DAErrorDomain Code=0 Operation could not be completed. (DAErrorDomain error 0.) problem
marlec 4/1/2010 1:11:28 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.

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