Capture User ID and populate in a variable using IUSER

Hey ,

The issue is related to User Management Tab > Identity Management in the Portal

Requirement

Need to develop a Web dynpro java link in the Portal, when executed it needs to get the all the USERS from LDAP ( LDAP table name is UME_STRINGS ), and identify if the field Krb5Principalname is blank, then populate the USER ID into that field and save it back to LDAP.

Can you please help how to get the all the Users from the LDAP using Java code.

I know i need to use UMFactory class but how to get the All the users stored in LDAP ?

Thanks