477b21a6-727e-413f-b5b8-cd0f27c02b6b.tenant.runtime.msappproxy.net AXFR zone transfer

Not an apex domain The domain 477b21a6-727e-413f-b5b8-cd0f27c02b6b.tenant.runtime.msappproxy.net is not the root of its zone.
Instead, try zone transfer on trafficmanager.net .