Normal software upgrade steps are applicable for customers who are upgrading a pair of High Availability Edges to Release 3.3.x or earlier (e.g. 3.3.2 P2). However, customers who are upgrading Edges deployed in HA to the Release 3.4.x branch or later are required to perform an intermediate upgrade to 3.3.x prior to upgrading their HA Edges to the desired 3.4.x or later release. Upgrading a single, standalone Edge directly from a 2.x Release to a 3.4.x or later release is supported with no known issues.