Home > Storage > PowerScale (Isilon) > Product Documentation > Management and Migration > PowerScale OneFS User Mapping: Mapping Identities Across Authentication Providers > Conclusion
The OneFS user mapping service combines identities from different directory services. The mapping service unites a user’s identities from LDAP, NIS, and Active Directory into a single access token that provides multiprotocol data access to files stored on a Dell PowerScale cluster. Users who gain access to the cluster over SMB can access UNIX files stored over NFS with their LDAP accounts. Likewise, users who gain access to the cluster over NFS can access Windows files with their Active Directory accounts. As such, the user mapping service gives you the flexibility to solve identity problems in a NAS security context of multiprotocol data access governed by disparate directory services.