I am the QB Admin for my companies.  We recently upgraded to Enterprise ver. 24.  In the past when a user was in Single-user mode and I logged in QB would automatically switch the file to Multi-user mode and allow me to log in.  However, since upgrading to ver. 24 I now have to contact the other user and request they switch to Multi-user mode.  Is this an unintended consequence of changes made in ver. 24 compared to ver. 23?