HI @lrossy31 ,

Hope you are doing great.

• Create a business rule that triggers on the insertion of the record.
• In the script, use JavaScript to split the string into first name and last name.
• Then, construct a query to find the corresponding user in the user table.
• Finally, set the reference field to the found user.

Reference script for same :

(function executeRule(current, previous) {
    // Assuming 'name' is the string field and 'assigned_to' is the reference field.
    var fullName = current.name; // Assuming the format is "Last Name First Name".
    var nameParts = fullName.split(' '); // Splitting the full name.
    
    var gr = new GlideRecord('sys_user'); // Creating a GlideRecord object for the user table.
    gr.addQuery('first_name', nameParts[1]); // Assuming first name is at index 1.
    gr.addQuery('last_name', nameParts[0]); // Assuming last name is at index 0.
    gr.query(); // Executing the query.

    if (gr.next()) {
        current.assigned_to = gr.sys_id; // Assuming 'assigned_to' is the reference field.
    }
})(current, previous);