Quick internal staff-to-staff messaging, built into the app so a question about a project doesn't have to leave ClientManager.
Side menu → Messages → New Message. Pick one person for a 1:1 conversation, or several for a group. Messaging any coworker at your company needs no special setup or permission beyond having Messages access yourself.
While composing, you can tag the message to a specific Project — it shows as a small badge on the message so anyone reading the thread later has the context without asking.
Conversations with something new show a red unread count in the inbox, and a site-wide badge appears in the nav so you always know there's something waiting. Opening a conversation marks it read automatically.