Unable to update cortex to latest version

[Mahendran.M]

When i try to update the cortex version 8.1.1.43337 version, I got the attached error. I try to update from 7.9.1 version. 

[jmazzeo]

Hi @Mahendran.M, thanks for using the Live Community!

On what Windows version and build are you trying to update?

[neelrohit]

Hi @Mahendran.M ,

To complement to what @jmazzeo  just asked, it seems that you need to have Azure Code Signing patch installed on your endpoint. This is a mandate from Microsoft starting March, 2023 for all security vendors to sign their binaries with this patch and because 8.1.1 is a post March, 2023 release of Cortex XDR agent version, you will not be able to install the agent. Microsoft also mandates that because this patch is cumulative, you patch your endpoint or upgrade your OS patches to the latest available security update to have the ACS patch installed. 

There is an another Live community articles solved which responds to the same question in different responses which may be helpful for you: https://live.paloaltonetworks.com/t5/cortex-xdr-discussions/cortex-xdr-8-1-not-installing-on-windows...

Hope this helps!