If this is for user imports you should have a manager field in your LDAP import set with the fully qualified domain name. Something like CN= Full Name, OU = Group Name, OU=Users, DC= domain, DC=local. You don't need to map the manager field in the transform map. In the transform script enter the following ldapUtils.setManager(source, target);
This is what the out-of-the-box script looks like.
//
// The manager coming in from LDAP is the DN value for the manager.
// The line of code below will locate the manager that matches the
// DN value and set it into the target record. To ignore the manager
// from LDAP, remove or comment out the line: ldapUtils.setManager(source, target);
//
// NOTE: The 'manager' field SHOULD NOT be mapped in the 'Field Maps' related list
// if the manager is brought in through an LDAP import. The 'ldapUtils' scripts
// here and in the 'onComplete' Transform Map will map this value automatically.
ldapUtils.setManager(source, target);
The OnComplete transform script
//
// It is possible that the manager for a user did not exist in the database when
// the user was processed and therefore we could not locate and set the manager field.
// The processManagers call below will find all those records for which a manager could
// not be found and attempt to locate the manager again. This happens at the end of the
// import and therefore all users should have been created and we should be able to
// locate the manager at this point
ldapUtils.processManagers();
