How many time user logged on to AX at the time (for 3 tier structure)

You can find the user logging count by using SysUsersOnline class as below.

container con1,con2;

;

con1 = conpeek(SysUsersOnline::getAllOnlineUserInfo(), 1);

for(counter1 = 1; counter1 <= conlen(con1); counter1++)
{
con2 = conpeek(con1, counter1);

if (conpeek(con2, 2) == curuserid())
{
countUser++;
}
}