BREAKING CHANGE: Setting: General Options: List Backordered Items In Lookups - This setting was replaced with the List Backordered Items In Picking Item Number Lookup setting. Both settings work the same when set to True, which is the default value for both settings. If List Backordered Items In Lookups was set to False, the new setting will default to False.
Full Release Notes:
https://bit.ly/2kFpRBM