Verify which server you need to restart (You can check the roles to see which host server, 'node', owns which guest server, 'role')
Select Nodes, right click the desired server, and select Drain Roles (NOTE: make sure to verify the resources available to ensure the roles can be drained without causing issue. eg. enough RAM, CPU)
Verify that the Roles have migrated successfully by selecting the Node, and navigating to the Roles tab
Reboot the desired host
after the reboot has successfully taken place, navigate back to Failover Cluster Manager> Nodes> Right click and select Fail Roles Back
Make sure that all disks are not located on the node which has to reboot
Migrate all roles and VMs
Pause node in Nodes tab
If you don't know the IP of the remote host, you can right-click on the needed host and choose remote desktop. Then just simply reboot it as any other server/pc.
Start> Administrative tools> Failover Cluster ManagerFailover Cluster ManagerNodes, right click the desired server, and selectDrain Roles(NOTE: make sure to verify the resources available to ensure the roles can be drained without causing issue. eg. enough RAM, CPU)Failover Cluster Manager> Nodes>Right click and selectFail Roles Back