You can activate the Limit Concurrent Sessions plugin (com.glide.limit.concurrent.sessions) if you have the admin role.

1. Navigate to System Definition > Plugins.
2. Find and click the Limit Concurrent Sessions plugin.
3. On the System Plugin form, review the plugin details and then click the Activate/Upgrade related link.
4. Click Activate.
5. To enable this feature and set a maximum limit of concurrent sessions, go to the Plugin Files tab, find the following properties, and change the setting values:

   Option	Description
   glide.authenticate.limit.concurrent.interactive.sessions	You can enable the ability to limit concurrent sessions by setting the value to True. By default, this property is set to False, which means there is no limit on the number of interactive sessions a user can have active. Note: To disable this feature, set this property back to False.
   glide.authenticate.max.concurrent.interactive.sessions	You can set the maximum number of concurrent active interactive sessions a user can have on the instance across all nodes.

6. (Optional) You can also amend the following properties, if necessary:

   Option	Description
   glide.authenticate.session.types.to.limit.concurrency	This property limits session types. By default, only the web browser sessions have a limit. Session types include: Web Browser (1) Mobile Browser (2) ServiceNow Mobile App (3) Non-interactive (10) You can configure and set the value to '1' for web browser, '2' for mobile browser, or '1,2' for both. Note: Only web and mobile browser sessions can have a limit. There are no limits for sessions that originate from the ServiceNow mobile app or non-interactive sessions.
   glide.authenticate.limit.concurrent.sessions.across.all.nodes	This property restricts the limit of concurrent sessions per node instead of restricting them across all nodes of a ServiceNow instance. By default, the value is set to true, which limits user sessions across all nodes. If the property is set to false, only the sessions on that node and not the ones on the other nodes are subject to the limit.

7. Click Update to have the settings take effect.