Machine Translation Services (as well as Word Automation Services and PowerPoint Automation Services) throw an Exception “Service Application is unavailable”, if the Application Pool Account of the Service Application does not have a local profile (Windows Profile, not SharePoint).

The workaround is quite simple: log on as the Service Account on the SharePoint Maschine – or execute “runas /u:domain\appPoolAccount cmd”.

Hopefully this will be fixed in RTM.

Markus