Modifying Default Inactivity Timeout vSphere Web Client ,

For Vsphere 6.5 Web Client

From VCSA cli, modify the property named session.timeout = 120 to 0 in vi /etc/vmware/vsphere-client/webclient.properties and then, restart the service vsphere-client service

service-control –stop vsphere-client
service-control –start vsphere-client



Steps

1. Connect (ssh) to VCSA using root password, 
2. vi /etc/vmware/vsphere-client/webclient.properties
3. Modify session.timeout = 120 to 0 in above file
4. Restart vsphere-client service service-control –stop vsphere-client; service-control –start vsphere-client