There is a statement that is misleading and needs to be removed:
Note: In scenarios where files are automatically quarantined by Microsoft Defender for Endpoint, you will be able to download those files immediately.
We still can't download quarantined files for macOS and Linux as this is not supported yet as per Take response actions on a file in Microsoft Defender for Endpoint - Microsoft Defender for Endpoint | Microsoft Learn:
Important
Download quarantined file requirements:
- Your organization uses Microsoft Defender Antivirus in active mode
- Antivirus engine version is 1.1.17300.4 or later. See Monthly platform and engine versions
- Cloud–based protection is enabled. See Turn on cloud-delivered protection
- Sample submission is turned on
- Client devices must be running Windows 11 or Windows 10, version 1703 or later
- Server devices must be running Windows Server 2025, Windows Server 2022, Windows Server 2019, or Windows Server 2016