Admin Post Private Messages (PMs) from the old software are now called Conversations. There are no limits to how many you can have. You can invite up to 5 people into one conversation. Think of Conversations as a private thread between you and other members - not like emailed messages. You can start a conversation by clicking on the Avatar or Username of a member. A box called the Member Card will pop up and you'll see "Start a Conversation" right there. OR you can hover your mouse over your username in the top right hand corner of the header and a Drop Down Menu will appear with TONS of options. One of them is "Conversations."