You are the on-call systems operator for Tidewater Marine Analytics, which runs long offshore research deployments. When a crew member is on extended rotation away from the network, their shore login is dormant and becomes an attack surface no one is watching.
The vessel RV Meridian just rotated. Three analysts have begun a multi-week offshore deployment and their accounts must be taken offline. Three others have just come back ashore and need their accounts reactivated.