When attempting to install or upgrade to the Endpoint Protection client version 14.3 Release Update 8, the following error appears.
The SIS_Inst.log may contain the following lines:
14.3 RU8 requires Microsoft Azure Code Signing (ACS) support. To correctly verify modules signed by Azure Code Signing, computers are required to have the "Microsoft Identity Verification Root Certificate Authority 2020" certificate authority (CA) installed.
The 'Microsoft Identity Verification Root Certificate Authority 2020' certificate is not installed as a Trusted Root Certificate.
The 'Microsoft Identity Verification Root Certificate Authority 2020' certificate needs to be installed into the Trusted Roots Certificate Store.