[aliswe]

this falls when azure allows a-z0-9 hyphens and underscores on most resources, a-z and underscores (no hyphens or digits) on some resources, and on others, only a-z and like 20 characters.

that's not a fault with the article, though.

[GordonS]

Also, with externally addressable Azure resources, the resource name is used as part of the FQDN name, and you cannot change the hostname later. Which might impact on how you choose to name resources.