We would like to customize the Community URL. We want to use example.abc.com instead of abc@force.com. I have tried steps mentioned in below link in our enterprise edition org as we cannot create a custom domain in our dev org but it is just appending custom domain in force.com URL. Please help  

Link - https://help.salesforce.com/articleView?id=000205653&type=1

When I copy the URL into a browser window, I get "Site under construction"

My developer Org works OK. I've tried diff-ing the normal org and its as close to the developer org as I can get.

I'd be grateful for any assistance from anyone