Users of the legacy Office 365 Security and () Compliance center will soon be routed to Microsoft 365 Defender; this will include all security workflows, including Alerts, Threat Management, and Reports.
Security-related items in the Office 365 Security and Compliance center will not be redirected to Microsoft 365 Defender. Compliance solutions will be redirected to Microsoft 365 Compliance Center (March 2021, MC244886).
Earlier this year, Microsoft started migrating security workflows to the Microsoft 365 Defender portal.
For customers who have already enabled redirect as part of the previous communication during Microsoft's new homepage Defender for 365, the automatic redirect will now include alerts and redirect alert policies, in addition to any previously redirected.
For more information, please refer to this redirection support document.
