Internet Direct (Indy) Version 9.0.2 Beta
TSOARecord.Expire
Authoritative zone timeout value.

property Expire: Cardinal;
Description
Expire is a read-only Cardinal property that represents the 32-bit time value that specifies the upper limit on the time interval that can elapse before the zone is no longer authoritative. Expire is expressed in seconds.

Expire is used to control when a cached response from a DNS name server needs to be Refreshed or polled by a secondary name server or resolver. Other maintenance parameters for the TSOARecord, like MinimumTTL and Refresh, may also force a similar operation.