Domain Name Management In Azure. First of all sign in to the Azure portal with a global admin account for the directory. After you create your directory you can add your custom domain name.
Sign in to the Azure portal using a Global administrator account for the directory. Seamlessly integrate Azure-based services with corresponding DNS updates and streamline your end-to-end deployment process. The steps to add custom domain name in Azure AD Azure Active Directory.
The name cant be changed later.
Add custom domain names. If you would like to use a custom domain name see Configure a custom domain. When you create an Azure API Management service instance Azure assigns it a sub domain of. Thus it is possible to point your custom domain to Azure either via a CNAME record or an IP address.