The tricky part is making sure the apex NS records are consistent across all authoritative nameservers. A surprising number of dns providers do not let you edit those.
Yeah, it does need to be the same in the zone as well as with your registrar. As mentioned in StackOverflow's blog post, Azure doesn't support changing NS records.
Similarly, there are a fair number of DNS providers that don't allow you to use all DNS record types. For something so simple, providers can really go out of their way to screw it up.
Similarly, there are a fair number of DNS providers that don't allow you to use all DNS record types. For something so simple, providers can really go out of their way to screw it up.