title: Does Azure App Service Custom domain allow dot '.' in the domain address?
body: <p>I would like to create a custom domain for my Azure App Service. Domain address I would like to use is in the format
  <code>xx.yyyy.zzzz.com</code> but, it seems like Azure Custom domain doesn't allow dots '.' in the text.
  Are there any restrictions related to the naming custom domain? if so where can I find that documentation?</p>
  <p>Does anyone know how to address this?</p>