Update for vCenter / vSphere 6: With vCenter 6 the file structure on the vCenter server has been changed and the approach outlined in the blog does not work any longer. Please use the steps outlined within eDocs – Prepare the virtualization environment: VMware to import and trust the default certificate. In my lab environment importing the vCenter certificate directly from within Internet Explorer worked flawlessly. Make sure to import it for the Local Machine and into the Trusted People store.