You can adjust the allowed idle time for all sessions in Plesk as required.

To adjust session security parameters:

1. Go to Tools & Settings > Session Idle Time (in the Security group).
2. Specify the required Session idle time in minutes in the appropriate field. If a user session remains idle for the time period exceeding the one specified as the Session idle time, the control panel terminates this session.
3. Click OK.

To allow IP changes during one client session:

1. Go to Tools & Settings > Session Idle Time (in the Security group).
2. Select the Allow IP changes during one session checkbox. This option will allow customers with dynamic IP addresses and unstable Internet connection to work with Plesk at the cost of increasing the security risks.
3. Click OK.

To reset all parameters back to their default values:

1. Go to Tools & Settings > Session Idle Time (in the Security group) and click Default. The default session idle time will be set to 30 minutes.
2. Click OK.