This document describes how license can be updated if it is a HA pair.
However, this is not the case when a HA pair is used.
For the current HA design, FortiWeb use Serial Number to identify each member in an HA cluster.Uploading a new license will lead to an Serial Number change, which will add a new member to the existing cluster.Therefore, the upload license action has been limited in standalone mode.Workaround:
disconnect the target member from HA group -> Upload a license -> Rejoin the HA Cluster.
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