Bad news: not supported. MSFT iSCSI and NFS are both missing from VMware HCL. See:
http://www.vmware.com/resources/compatibility/search.php?deviceCategory=san
(Microsoft is not listed as a vendor there...)
Good news: You can use StarWind Virtual SAN Free. Also Windows-based but iSCSI *IS* supported by VMware for 5.5 and 6.0 (NFS is on the way). See:
VMware Compatibility Guide: Storage/SAN Search (StarWind Virtual SAN Free)
Unlike Microsoft iSCSI implementation StarWind does fault-tolerance (synchronous replication), RAM & SSD cache, tiering, snapshots, log-structured file system (like NetApp & Nimble) and other nice things. Still for FREE 
https://www.starwindsoftware.com/starwind-virtual-san-free
Good luck!