VMware Tools needs to be manually upgraded on the new ShoreTel Voice vSwitch or ShoreTel Virtual SA100.  As these appliances are running linux, here is the article that VMware published:

http://pubs.vmware.com/vsphere-50/index.jsp?topic=%2Fcom.vmware.vsphere.upgrade.doc_50%2FGUID-08BB9465-D40A-4E16-9E15-8C016CC8166F.html