Warning 1 – If upgrading to 8.4.1 from 8.3 or lower, new license keys will be necessary. You can upgrade the keys yourself from here.
Warning 2 – The MDOpen update site used must also be 8.4.1. The compatible MDWorkflow web app version is 8.4.
Warning 3 – All partitions that communicate with each other must be on at least version 8.4 during the same installation window. An 8.4 partition is compatible with 8.4.1.