Operating System Support?

Author :

URL : http:////docs.vmware.com/en/Site-Recovery-Manager/8.1/com.vmware.srm.install_config.doc/GUID-384B628F-35C8-4C96-9B36-ACCEBE6C6792.html

Topic Name : Site Recovery Manager System Requirements

Publication Name : Site Recovery Manager Installation and Configuration

Product/Version : Site Recovery Manager/8.1

Question :

Hi VMware,  just looking for the System Requirements for SRM 8.1 i don't find any information about which Windows Operating Systems are supported?  Is it even supported running as a virtual machine?  Many thanks!