Davison County workers were warned not to open city emails, while Mitchell’s mayor said there was no indication the city’s email environment was affected.
A 15-hour outage affected three public websites, but 911, 311, bill payments and permit services remained available, and officials reported no intrusion or data loss.
The city said no data was taken after a Dec. 26 incident, but utility billing customers faced delayed bills, paused automatic payments and no-shutoff accommodations for weeks.