The application. TriNet Platform - Interstitial. Tip: Download the TriNet Mobile app to quickly access information such as your paycheck, current benefits and company directory TriNet Platform - HRPassport is your one-stop destination for all your HR needs. Only Company Owner and Admins can add and manage users in TriNet Expense Management New users can be added to a company account during setup or at any point thereafter from the Manage Users page How to Add Individual Users Go to Settings > Company Settings > Manager Users > Click on "+Add User" Enter in the user information: Track your flex benefits - check account balances for FSA, HSA, and commuter benefits, and replace lost benefit cards in seconds. From “The Civil War” to “The Vietn. New hires can sign time-sensitive documents and complete onboarding in the app, so they're ready to go on day one. Learn how TriNet can help you save time and money, and access customer stories and awards.