waws-prod-am2-4f0021d1.sip.p.azurewebsites.windows.net IXFR zone transfer

Changes since SOA version

IXFR is a zone transfer request that returns changes since a specific SOA version. Enter the SOA version to request changes since then.

Not an apex domain The domain waws-prod-am2-4f0021d1.sip.p.azurewebsites.windows.net is not the root of its zone.
Instead, try zone transfer on azurewebsites.windows.net .