You can display a user list from other servers in an SAP System using this function.
You are already in the User List screen (TransactionSM04 ).
Choose Goto ®Terminals. All users who are logged on to the SAP System are displayed together with the respective server. Positioning the cursor on the desired user, and then choose Goto ® Remote server. You now only see the users who are logged on the selected SAP server.
You switch over to the new server. You can see which server you are logged on to in the third entry in the status line on the bottom right. If you click the green arrow, or choose Goto ® Back, this takes you back to your old server.