Basic Administration > Managing User Participation > Participant Administration > Understanding Participants (Users, Groups, and Organizations) > Using the Participant Administration Utility > Best Practices When Maintaining a Directory Service Outside of Windchill
  
Best Practices When Maintaining a Directory Service Outside of Windchill
Because your Windchill solution may be connected to a corporate LDAP server rather than a Windchill-owned LDAP, you may not be creating users through the Participant Administration utility; instead, users are automatically created in the Windchill database when the users become active in the solution. As users are removed or changed in the user directory service through an external tool, you will need to manage the Windchill user objects by doing the following:
• Deleting Windchill user objects that no longer have valid user directory service entries (see Maintaining the Connections between Participant Objects and their Directory Service Entries).
• Cleaning up after deleted users (see Deleting Users).
• Managing the participant cache so that changes in a user directory service are available in Windchill (see Managing the Participant Cache).