Siebel Administration >  Find list of active users in Siebel

There are 3 ways to do it in Siebel 8x and two ways in 7x (This is what I know, maybe there are other ways).

in 8x:
There is a table called s_srm_task_hist. This contains a list of all current users as well as past users.
By default, this data is deleted every 24 hours. The column TGT_DELETE_TS has a timestamp. If our current
date/time is 24 hours greater than the value in TGT_DELETE_TS, then this data will get deleted.

Parameter 'DeleteEventHistoryInterval' for the SvrTaskPersist component controls the
duration of tasks info kept in the S_SRM_TASK_HIST table. DeleteEventHistoryInterval is in seconds.

The column srvr_user_name contains the login id of the user in Siebel.
The column srvr_host_namecontains the server name of the logged in user.
The column srvr_comp_name has the object manager name of the user
The column srvr_end_ts has the timestamp of when the user logged out.
If this column is null then the user is online.

in 7x and 8x

Siebel allows us to create a webpage where user statistics can be displayed.
The url is typically http://hostname/objmanager/_stats.swe

We need to have/add these parameters in the configuration file.
The default configuration file of the web server is eapps.cfg

[swe]
SessionMonitor = true
AllowStats = true

[defaults]
StatsPage = _stats.swe

Add these parameters and then restart the webserver.

The url to check will be
http://host_name/objmanager/_stats.swe
http://host_name/objmanager/_stats.swe?Verbose=High&Reset=True
e.g.
http://10.152.169.69/sccobjMgrenu/_stats.swe?Verbose=High&Reset=True

Third way:
Another way to check the number of logged in users in 7x and 8x would be to use
Server Manager.

Log into Server Manager and get a list of the object manager names
list components show SV_NAME, CC_NAME, CC_ALIAS , CP_DISP_RUN_STATE

Copy the CC_ALIAS of the Object manager. e.g. if the CC_ALIAS is eFinancials_NOR

After that
List Active sessions for comp eFinancials_NOR show SV_NAME,CC_ALIAS,OM_LOGIN

This will show you the userids, server name and object managers.