Call Function: CEXP_Init for initialization. If you pass it LDAP information, it initializes an LDAP connection used during the lookup phase for discovering on which calendar server the user resides. This connection is set up for a threaded environment. All threads share this connection, but since the locking is done in the LDAP, it is fast enough in most environments. The connection is kept open so there is no set up or tear down cost per lookup.
Other things set up by initialization include the programmer supplied attribute to use for matching the lookup user name in LDAP queries.