1. A method for just in time delivery of a consistent user profile to overlapping user sessions, the method comprising: receiving, by a server agent executing on a computer, a request from a first user session for a first file of a user profile of a user; retrieving, by the server agent responsive to receiving the first user session request, the first file from a base user profile of the user; delivering, by the server agent just in time, the first file to the first user session; receiving, by the server agent, a request from a second user session for the first file and a second file of the user profile, the second user session and the first user session executing simultaneously; identifying, by the server agent responsive to receiving the second user session request, a modified version of the first file in a provisional user profile of the user; retrieving, by the server agent responsive to identifying the modified first file in the provisional user profile, the modified first file from the provisional user profile and the second file from the base user profile; and delivering, by the server agent just in time, the modified first file and the second file to the second user session.