To view the SOA settings, in the shortcuts section of the Home page, click SOA (DNS section). The Default SOA Configuration window opens displaying your existing SOA settings.
The SOA settings are as follows:
Name Server (Listed only for zone-specific SOA). The name of the server on which the zone resides.
Administrator Email. The email address of the administrator responsible for the master DNS name server.
Refresh interval. The frequency (how often), in seconds, the slave name server checks with the master name server for updated lookup information.
Retry interval. The frequency (how long), in seconds, a slave server must wait before retrying a failed zone transfer from the master name server. Normally, the retry interval is shorter than the refresh interval.
Expire interval. The upper limit, in seconds, that a slave name server can use the lookup data it currently has before the data expires.
Minimum Time To Live. The length of time, in seconds, the slave name server can cache data.