You can SSH to iDRAC and run "racadm racreset" command to restart iDRAC which will close all open session.

Another options is wait till timeout period which will automatically logout the session. I believe by this time all sessions may be already timeout 

In SSH you can also run the command "racadm getssninfo" to get all session details and use "racadm closessn" for closing the session. Run the command "racadm help closessn" to get more help on the usage

Hi @DomServers,

In addition to Shine K reply, please refer to the below guide which may help you.

https://dell.to/3VeCMWF

Hello, to use some commands needs administrator privilige. For example pg43 https://dell.to/3PPZuDl

closessn
NOTE: To use this subcommand, you must have Administrator permission

Can you share the response you get when you tried the racadm command

Hello,

I have tried that but that won't work as racadm commands are not enabled when I have tried. I have just tried to connected but the sessions seem to have not expired yet.

When I try to run racadm commands I get the following note.
'This Integrated Dell Remote Access Controller does not support RACADM commands

Please contact Dell Customer Service to upgrade your version of iDRAC'

Thanks Erman. An iDRAC firmware update seems to have done the trick.