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MC399488: Microsoft Defender for Endpoint on Linux and MacOS – Mandatory Update to ‘Required’ URLs List

We recently announced the general availability and gradual roll-out of our enhanced anti-malware engine for Linux and macOS.

Note: If your organization is not using Linux or macOS you can safely disregard this message.

MC399488: Microsoft Defender for Endpoint on Linux and MacOS – Mandatory Update to ‘Required’ URLs List

When this will happen

Starting July 31, 2022, access to certain Microsoft URLs will be *required* to ensure uninterrupted cloud-delivered protection on your Linux and macOS systems behind a proxy.

How this will affect your organization

Organizations that have not allow-listed access to the below mentioned URLs by July 31, 2022 will be unable to download threat definition updates required for effective anti-malware protection.

What you need to do to prepare

To ensure Microsoft Defender Antivirus cloud-delivered protection works correctly, your security/IT team must configure your network/proxy/internet settings to allow connections between your endpoints and certain Microsoft URLs. To support the new Microsoft Defender for Endpoint on Linux and macOS anti-malware engine enhancements, you must allow-list within the proxy ecosystem in your environment the following URL endpoints:

  • *
  • *

Additional information is available in our documentation and also on our blog.

  1. Version Requirements: Minimum version requirements to enable a smooth transition:
  2. The minimum Microsoft Defender for Endpoint version number must be 101.62.64 Feb 2022 build

Soon after migration begins, versions older than 101.62.64 will stop getting protection updates

Note: Additionally, to support definitions storage in non-standard locations (outside of /var) for definition updates please ensure that you are at version 101.71.18.

Learn more

Message ID: MC399488
Published: 11 July 2022
Updated: 11 July 2022
Action required by: 30 July 2022

Alex Lim is a certified IT Technical Support Architect with over 15 years of experience in designing, implementing, and troubleshooting complex IT systems and networks. He has worked for leading IT companies, such as Microsoft, IBM, and Cisco, providing technical support and solutions to clients across various industries and sectors. Alex has a bachelor’s degree in computer science from the National University of Singapore and a master’s degree in information security from the Massachusetts Institute of Technology. He is also the author of several best-selling books on IT technical support, such as The IT Technical Support Handbook and Troubleshooting IT Systems and Networks. Alex lives in Bandar, Johore, Malaysia with his wife and two chilrdren. You can reach him at [email protected] or follow him on Website | Twitter | Facebook

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