License Not working for Azure app service

We bought a license for our domain *.ourdomain.com. It is working fine in our AWS IIS server. We plan to move our site to Azure app services and added custom domain for our site eg. login.ourdomain.com. The license was not working for our azure app service custom domain. When we hit the URL https://login.ourdomain.com/DocImage.axd it displays Doconut 1.0.4.2 is running on xxxxdomain.azurewebsites.net. Help me to resolve this issue.