Legal challenge considered likely.
Reviews its change processes after Triple Zero call carriage failure.
Relative was able to place a Triple Zero call.
Disruption stretches into Sunday.
Telco faces multiple investigations.
Deaths occurred in three affected households.
With Dr Rachna Gandhi confirmed to have left after four years.
Permanent role vacant since April.
Will be extended to Google Workspace in coming weeks.
Legacy authentication bypassed modern security controls and logging.