1)Limit of admin session is one by default, can i change it?
2) Where i can find CUE Admin guide
3) For notification for mobile: where i should configure the necessary css to be able to call out the mobile number
"call patern is allowed *"
You are most welcome :) I did some more research on this and found that only 1 Administrator can be logged in at any given time (what you are seeing). This is not a configurable setting.
Hope this helps!