I am evaluating agent 126.96.36.1996 on a mixture of Windows 10 and XP at the moment and Windows 7 later. None of the computers that I am testing are getting daily DAT updates. The majority of the test computers have been upgraded from agent 188.8.131.522.
I haven't found any document that says EPO 5.1.1 isn't supported on this agent version.
I haven't created a separate autoupdate task in VSE (8.8p7), we are just using the stock task from VSE.
The autoupdate task isn't working as per the screenshot below which was taken just now:
The ePO server rebooted overnight for patching, The first time since trying out the updated Agent. I received a call from Intel Support and it's all working again.
Looks like the server might have had an issue with the new agent.