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 85dee24840a70bd7c7a1557a9c356894.325e310ac37fb22a5ef2cb6af68fface.t0499837001730361047.sectigo.com is not the root of its zone.
Instead, try zone transfer on sectigo.com .
Instead, try zone transfer on sectigo.com .