Reference: SOA serial numbers limitation - BlueCat Address Manager - 9.2.0

Address Manager Administration Guide
prodname
BlueCat Address Manager
version_custom
9.2.0
  • The Data Checker doesn't validate the SOA serial number format.
  • The SOA serial number can't be retrieved from secondary DNS/DHCP Servers.
  • When resetting an SOA serial number, no other changes are permitted on the zone.
  • If the serial number is at the largest allowed value of 4,294,967,295, making a change to the zone resets the number to 1.
  • If a zone has been defined in Address Manager but not yet deployed, the Retrieve button returns 4,294,967,295 by default.