From your article "For example, Azure Files files and folders have default permissions of 0777, with root as owner, and it does not support modification" that sounds like cifs, I can't tell you much about Azure Files NFS but I do know they support basic file rights and setting of uid/gid, my company uses them in Azure for SAP.
one more thing, there are two NFS implementations, one v3 and one v4; the v3 is on top of blobs, the v4 one is on top of azure files. we use the v4 one, never tried the blob one :)
Yes, we picked the default one in docs, which should be NFS v3, will redo the test against NFS v4 and update the article, thanks!
Azure has Azure Files and Azrue NetApp Files, the later one is provided from NetApp. Azure Files was used in the article, maybe you are using NetApp Files?
We will update the article to make it clear, thanks!