You can now rehydrate an archived blob by copying it to a different storage account, as long as the destination account is in the same region as the source account. Rehydration across storage accounts enables you to segregate your production data from your backup data, by maintaining them in separate accounts. Isolating archived data in a separate account can also help to mitigate costs from unintentional rehydration.
For more information, see Azure Archive rehydration.