A mobile device, system, and method are directed towards enabling a user, virtually on the fly, to invite another user to participate in an on-line conferencing session, by providing a link that automatically enables the other user to participate in the conferencing session. In one embodiment, the conferencing session is a text messaging conference session, such as one that might employ instant messaging, or the like. In one embodiment, a user may request a conferencing session to be established, by sending a request to a server device. The request may, include an identifier of an invitee with whom the first user wishes to communicate. The server determines a unique link for the invitee and session, and sends the invitee an invite message with their unique link. Selecting the unique link enables the invitee to automatically access and to participate in the conferencing session with the first user.