Integration beetwen RTC and TFS
Accepted answer
You have to do this as a double bounce - export the TFS repository to a Subversion repo, and then import that into RTC.
I've already answered this question before on these forums - do a search and you can find links and articles etc.
Comments
One other answer
I would look at Tasktop. They might be able to synchronize work items. https://www.tasktop.com/integrations/microsoft-team-foundation-server