App Service Domain allows you to Purchase and manage a custom domain from within the Azure portal.

• Simplified domain life cycle management
• Purchase and manage domains for your Azure Services (supported TLDs: com, net, co.uk, org, nl, in, biz, org.uk, and co.in)
• Subdomain management and assignment
• Auto renew capabilities
• 'Privacy Protection' included for free (except for TLDs who's registry do not support Privacy. For example: co.in, co.uk, etc.)
• Free cancellation within first five days
• Simplified DNS management using Azure DNS
• Ability to 'Transfer in' your domain to Azure (coming soon)