integration between RTC 3.0.1 to Sharepoint
Accepted answer
There was an integration made by Mainsoft between Sharepoint and RTC up to version 2. But if you look for it you will find that it has been withdrawn from marketing, i. e. it is not available any longer. So at the moment to my knowledge there is no tool that integrates with Sharepoint any longer.
2 other answers
In this earlier post 'Sharepoint Integration?' , a potential workaround for 'integrating' RTC with Sharepoint was detailed.