[cisco-voip] Upgrade CCM 4.2.3 to 6.1.2 and Extension Mobility

[PhilippG]

I am upgrading a 3-server-cluster of 4.2.3 to 6.1.2. All users are using 
Extension Mobility and are logged in. I was running DMA and got my 
tar-file. I was installing 6.1.2 and after some time the installation 
stopped and the install log files told me that a procedure wanted to log 
out all users but could not. I logged off all users in the 4.2.3 system 
(server is in my lab) and let the DMA run again. With that tar-file i 
was able to complete the installation of 6.1.2 So my question is: For 
future upgrades, do i have to log off all users before i run the DMA 
file or should this upgrade also works with users logged in? If it 
should work with users logged in, are the users also logged in after the 
upgrade, because obvioulsy the upgrade process is trying to log off all 
users during database installation?