update manager

[goodface]

there are 100 vm in an cluster ( esxi 5.5) vmware tools running out of date on all vm. now can i update with vcenter update manager to all vmtools. some vms are  linux some vms are windows so i dont know their admin password. is it possible to update vmtools without admin password with vcenter update manager and then after update  vmtools .is need vms reboot ?

[rcporto]

You can use UPdate Manager to upgrade VMware Tools without know the administrator/root password of your VMs, but take in mind that if upgrade fails, you will may need to logon on failed VM to do the upgrade manually.

About if VMs will need a reboot, it depends, see here: Clarification on (Zero-Down Time) VMware Tools Upgrade in vSphere 5.1 - VMware vSphere Blog - VMware...