SOA Expire Value
Tests that the Start of Authority (SOA) expire value is in the recommended range.
The Start of Authority (SOA) record is a special DNS record that lists certain administrative information about the domain name and helps with coordinating zone transfers. Zone transfers are how a cluster of servers can coordinate on updating information.
The Expire value is the number of seconds that a secondary server should respond to requests if the primary server does not respond. This number must be larger than the sum of Refresh+Retry. The recommended values are somewhere between 1 and 2 weeks. This test will only be marked as a failure if the expire value is shorter than 2 days or longer than 6 weeks.
Depending on your DNS provider, is likely that you do not have control over setting the values of the SOA record.