Once you deploy VMware vCenter appliance from OVF file and configure the database, SSO, NTP and authentication, the vCenter server will then be presented as localhost.localdomain. To change this value to what ever you need your vCenter server hostname to be, do the following:
1. Login into your vCenter appliance web interface (https://your.vcenter-applianceIP:5480) using user root and default password vmware (unless you have change it intentionally from the console!!)
2. Click tab Network and then the Address button
3. Click Admin tab, toggle “Certificate regeneration enabled” option to Yes and click Submit
4. Click System tab and click button Reboot.