Hi Alex,
An AP cannot be managed by two different controllers at the same time. Even if you have a N+1 SmartZone cluster, AP will always be managed by one of the nodes, not all of them.
An AP cannot have two control tunnel establish with two different nodes (On same cluster or different) at the same time.
So short and simple answer is No, it cannot be done.
Syamantak Omer
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