Multi User Editor Queries

i have opened the same base project in three systems [different path location].

  1. Multi User Editor:
    a) i have run multi user server in system_A and created a session too.
    b) in system_B, when i open multi user window, it is listing the session.
    c) in system_C, when i open multi user window, it is not listing the session. if i run another multi user server, it is able to list the session.
    want to understand what could be the reason, system_B [no server], system_C [run server]

  2. Multi user config change location:
    “Linux/Engine/Programs/UnrealMultiUserServer/” where its storing the session and their transactions, is it possible to change this config location to a different location, to make it centralized.

any suggestions on this will be helpful.