I had my AMEX (from Delta Skymiles) registered with iDine, miles to post to Delta when I was hot to get Delta miles to top off an award.

Now I'm not interested and am pursuing United miles. I went in to iDine via the United MP promotional site and registered my AMEX, miles to post to my United account.

Will this take care of the reassignment of miles, so that they'll now go to my United account, or do I need to do more to get them to no longer post to Delta Skymiles?