You have a Microsoft 365 E3 subscription.

In Microsoft 365, the unified audit log retention depends on the audit tier included with the subscription. Current SCI/Compliance documentation states that Audit (Standard)—which is available with Microsoft 365 E3—retains audit records for 180 days. The docs describe that organizations with E3 receive “up to 180 days of audit log retention” for user and admin activities captured in the unified audit pipeline. Longer retention (for example 365 days and beyond with customizable policies) is part of Audit (Premium) features generally associated with E5/E5 Compliance. Because the scenario specifies a Microsoft 365 E3 subscription using the unified audit log and Basic/Standard Audit, the retention period for audit records is 180 days.