Microsoft yesterday announced that the next major version of Team Foundation Server , Team Foundation Server ’15’ will no longer provide an out-of-box integration with Project Server. Microsoft also said that they will not be providing an out-of-box integration for Project Online and Visual Studio Team Services. But they will continue to support their existing integration solution in TFS 2010 SP1, 2012, 2013, and 2015/Project Server 2007, 2010 and 2013/. Microsoft is not leaving the customers who are using this integration behind, their partner Tivitie will provide an integration solution for both Project Server/TFS and Project Online/Team Services.
Microsoft came up with this integration idea when most of the projects in TFS were being run as traditional projects. Nowadays, Agile has became dominant, and this Project Server/TFS integration is of no use because Agile teams track progress differently than traditional projects. Traditional projects typically plan for the entire scope of a project and use hours to track progress. Agile projects plan on demand, typically 2-3 sprints out, and often use story points to track progress.
Read more about this announcement here.