Explanation: The reason for this is that unlike the other Citrix Services… the “Citrix HDX MediaStream for Flash Service” actually localizes the ServiceDisplayName which, for example, in French is “Service Citrix HDX MediaStream pour Flash”. If you scroll down with the “S” names you will see it listed. No functionality is impacted as the Citrix HDX MediaStream for Flash Service is actually installed and running as expected.
Scenario: After installing the Citrix VDA software on a machine with a region/localization set to something other than US/English the Citrix HDX MediaStream for Flash Service may appear to be missing from the Services MMC. Specifically it may not be listed with the other “Citrix” services.