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An adversary may steal web application or service session cookies and use them to gain access to web applications or Internet services as an authenticated user without needing credentials.
To identify such sessions, Oort alerts on successful login from 2 or more IP-Device pairs for a single session ID.
First, make sure that 'Enforce device binding for creating sessions' parameter is Enabled.
Second, contact the end-user to verify the origin of the actions.