Home > Storage > PowerScale (Isilon) > Product Documentation > Management and Migration > PowerScale OneFS User Mapping: Mapping Identities Across Authentication Providers > Merging Windows and UNIX tokens
When Windows and UNIX usernames fail to match each other across directory services, you can write rules that use either the join or the append operator to merge two usernames into a single token. For example, if a user’s Windows username is win_bob and the user’s UNIX username is UNIX_bob, you can join them by writing the following rule:
MYDOMAIN\win_bob &= UNIX_bob []
Another option is to write a rule that appends the UNIX account to the Windows account. The append operator adds information from one identity to another: OneFS appends the fields that the options specify from the source identity to the target identity. OneFS appends the identifiers to the additional groups list. Here is an example of an append rule with the groups option:
MYDOMAIN\win_bob ++ UNIX_bob [groups]