This video covers how to set up backups in vCenter and how to manually take a backup of vCenter. This example is using vCenter 7.0U3, the process is identical if not the same for version 6.7. There are some known issues with backups in 7.0U3 which are discussed in the video.
More info is available in our knowledge base at the link below.
https://kb.confusedit.org/books/vcent...