Displaying mapping information

sp_helpmaplogin displays mapping information:

sp_helpmaplogin [ (authentication_mech | null), (client_username | null) ] 

where:

If you do not include any parameters, sp_helpmaplogin displays login information about all users currently logged in to Adaptive Server. You can restrict the output to specific sets of client user names or authentication mechanists by using the parameters listed above.

This displays information about all logins:

sp_helpmaplogin
authentication   client name   login name
--------------   -----------   ------------------
NULL             jsmith        guest
LDAP             NULL          create login