I know this post is a couple of months old now but I am in the process of implementing Ole Hallengren's maintenance solution to utilise the StoreOnce appliances my Company purchased. There is a Catalyst Plug-In for SQL Server which is installed on each server that you want to backup, allowing you to backup straight to the StoreOnce appliance (without the need for a share as such). You can then run an executable from a CLI window or install an extended stored procedure (HPE won't be moving away from this until late 2019) which can be used from within Management Studio. I have had no issues restoring from StoreOnce and have been able to automate some of those restores although I haven't considered it for replacing the logshipping we already have in place - yet. If you haven't been able to resolve everything yet, please ask and I will see if I have encountered anything similiar.