Identified that the ENS installation was failing due to missing ACS Code Signing certificates.
Solution
- Performed a clean removal of all Trellix products from the system.
- Try to proceeded with a standalone installation of ENS if installation from ePO was failed
- After installing the ACS certificates and performing a system reboot, the ENS installation completed successfully.
Recommendations Shared:
- Apply KB91697 – Root Certificate update
https://thrive.trellix.com/s/article/KB91697?language=en_US&page=content&id=KB91697 - Install KB96488 – ACS Code Signing Patch
https://thrive.trellix.com/s/article/KB96488?language=en_US&page=content&id=KB96488 - Perform a system reboot after installing the above patches.
- Then proceed with the ENS installation.
- Also shared KB55962 – Reasons to restart a system after you install or upgrade a product
https://thrive.trellix.com/s/article/KB55962?language=en_US