Slowly getting to grips with WFA, so please forgive me if I'm missing something fundamental but I've spent some considerable time trying to get a WFA command to remotely set NTFS permissions on a cluster hosted share. The latest version of my code (also hosted on the windows wfa server) is here:
Yes, my guess is that you are running the WFA services as your local account. Change that to be a domain account that has the privileges to that share. WFA runs all of its scripts via that user. The services are 'Netapp WFA Server' and 'Netapp WFA Database' honestly, you may be able to get away with only change the 'Netapp WFA Server'.