(Updated) Brand impersonation protection for Teams Calling

🚨 The Signal: Teams Calling will proactively warn users about suspected brand impersonation in inbound external calls. This enhances protection against social engineering and reduces the risk of users falling victim to fraudulent callers.

The Impact

All Teams Calling users are affected by new warnings for high-risk external calls, reducing social engineering risk.

• End Users: Will see warnings for suspicious calls, improving their ability to identify and avoid scams.
• Helpdesk Staff: Need to be aware of new call warnings to support user queries effectively.
• Security Team: Benefits from reduced social engineering attack surface via automated warnings.

The Action

1. Inform helpdesk staff about the new high-risk call warnings in Teams Calling.
2. Update user awareness training materials to include guidance on responding to brand impersonation warnings in Teams.

Domain: Teams · Impact: medium · Workload: Teams · Essential Eight: User Application Hardening · ISM: ISM-1412, ISM-1485, ISM-1486, ISM-1542, ISM-1585, ISM-1667, ISM-1668, ISM-1669, ISM-1670, ISM-1823, ISM-1824, ISM-1859, ISM-1860