Microsoft Azure installations and SSL certificates
When you deploy a VM into the Azure cloud platform it will be accessible using a subdomain of cloudapp.net, such as https://foldrv4.cloudapp.net
Due to the fact that Microsoft owns and therefore manages the cloudapp.net domain, it is not possible to have a certificate issued for the Common Name https://foldrv4.cloudapp.net. This applies to both free Let’s Encrypt SSL certificates or a certificate purchased from a traditional Certificate Authority such as Verisign, Thawte or GoDaddy.
The solution is to use a custom domain to access the Azure hosted Foldr installation and have the SSL issued for this domain. Using a CNAME (alias) record and A (host) record on your custom domain you simply point your custom domain at the cloudapp URL
CNAME = azure.foldr.io >> foldrv4.cloudapp.net
A record = azure.foldr.io >> Public Virtual IP of Azure VM (found in the Azure portal)
More information can be found here