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 mx-ziggo-nl.nl2.edge.unified.services is not the root of its zone.
Instead, try zone transfer on nl2.edge.unified.services .
Instead, try zone transfer on nl2.edge.unified.services .