Hi Brandon,
Thanks for the comment.
I was verifying KB4019216(server 2012 ) installation in few servers and it was saying failed with the return code 1.
when I was verifying with the link for the retun code, it was showing as,
UnknownException - There was caught unexpected exception during the tool operation.
I was able to see the cert information in the machine. Also in some machines if I try to install the update manually(download history path), it says as "patch not applicable" but shows in the agent interface.
trying to collect the logs and raise a ticket but before that I would like to know whether I am facing this or any other customer facing the same issue? Just though of checking the status in forum.