I know sharing licenses is against their EULA, and not advisable, so you may want to re-think your deployment strategy.
You say you are having an issue, but do not specify what the issue is -- can you provide more detail on your problem?
All Technical Specifications can be found here: All Technical Specifications | Tableau Software
I hope this helps!
Sorry about that. The vizzes won't load. We fit all of the necessary resource requirements, but I wanted to know how many go above and beyond those requirements.
I'm just another customer like you, so no need to apologize -- I just figured someone would say it, anyway. We did the same thing early on, but eventually learned that sharing usernames is not ideal (prohibits you from tracking usage stats, seeing who is viewing what, etc.)
Without more information about your environment and what exactly you are experiencing, its very difficult to help.
When you say "vizzes won't load", do you mean NONE of your workbooks load on Server, for any user? -- It may help to have more detail on what you are experiencing.
Best of luck -- if you're just looking for examples of Tech Specs from Server administrators, you might post that question in the Server Admin area of the Forums. http://community.tableau.com/community/forums/server-administration