Home > Storage > PowerScale (Isilon) > Product Documentation > Management and Migration > PowerScale OneFS User Mapping: Mapping Identities Across Authentication Providers > Rule ordering
OneFS processes every mapping rule by default. Processing every rule, though, can present problems when you apply a rule to deny all unknown users access. In addition, replacement rules may interact with rules that contain wildcard characters.
To minimize complexity, Dell PowerScale recommends that you group rules by type and organize them in the following order: