When do we need to upgrade vmware tools?
VMware Tools upgrade is optional, BUT is always recommended... you can read more about in this blog article: Is a VMware Tools Upgrade Required When Upgrading vSphere? | VMware vSphere Blog - VMware Blogs
Hi
Welcome to communities.
you can configured auto upgrade, please follow below KB
http://pubs.vmware.com/vsphere-51/index.jsp?topic=%2Fcom.vmware.vsphere.upgrade.doc%2FGUID-B3989445-...
then why vmware tools hows "out of date"
Because the version does not match the version available on the host.
