what I did:
I came from a GELI encrypted FreeNAS 11.3-U5 install and upgraded to 12.0-U1.1
After running for some time I wanted to use native encryption for my zfs pool. So I replicated all datasets and volume over to a secondary box with TrueNAS 12.0-U1.1 to a natively encrypted pool. All went fine. After replicating back, all datasets and volumes were locked. No problem, I have the keys from my secondary box. Clicked unlock at the datasets et voila: unlocked.
Now the problem is: there's no such unlock option with the volumes...
can you help please?