I have successfully setup a custom URL for my Church Online account, but the only way I was able to get it to work was if I used a CNAME record with 'www.riversidechurch.live' getting pointed to 'riverside-church.churchonline.org'
I know this seems picky, but I would prefer to have the clean look of having the URL appear without the 'www.'
I kept running into issues when I attempted to setup my CNAME record as 'riversidechurch.live' getting pointed to my Church Online URL. GoDaddy would give me an error message and after some research it seems like it is because you can't do CNAME records on your root domain unless there aren't any other DNS records that refer to your root domain.
Hopefully someone can be of help with getting this to work. If it isn't possible, that's fine. But, I would love to have the clean look without the 'www.'