How to Install :- https://technet.microsoft.com/en-us/library/gg697606(v=sc.12).aspx
How to Open VMM Self Service Portal :- https://technet.microsoft.com/en-us/library/gg702420(v=sc.12).aspx
Thanks,
but These are the Links for System Center 2012 - Virtual Machine Manager. How can I download, install and configure the HTML-Extension of the Self-Service Portal of System Center 2016 - Virtual Machine Manager?