私はそれを自分で解決したと思います。
// Set up default team sprint date and time
var teamConfig = _tfs.GetService<TeamSettingsConfigurationService>();
var css = _tfs.GetService<ICommonStructureService4>();
string rootNodePath = string.Format("\\{0}\\Iteration\\Release 1\\Sprint 1", _selectedTeamProject.Name);
var pathRoot = css.GetNodeFromPath(rootNodePath);
css.SetIterationDates(pathRoot.Uri, DateTime.Now.AddDays(-5), DateTime.Now.AddDays(7));
var configs = teamConfig.GetTeamConfigurationsForUser(new[] { _selectedTeamProject.Uri });
var team = configs.Where(c => c.TeamName == "Demo").FirstOrDefault();
var ts = team.TeamSettings;
ts.BacklogIterationPath = string.Format(@"{0}\Release 1", _selectedTeamProject.Name);
ts.IterationPaths = new string[] { string.Format(@"{0}\Release 1\Sprint 1", _selectedTeamProject.Name), string.Format(@"{0}\Release 1\Sprint 2", _selectedTeamProject.Name) };
var tfv = new TeamFieldValue();
tfv.IncludeChildren = true;
tfv.Value = _selectedTeamProject.Name;
ts.TeamFieldValues = new []{tfv};
teamConfig.SetTeamSettings(team.TeamId, ts);
これにより、
1. Iteration Start and Finish Date for an Iteration
2. Backlog Iteration Path for the team Demo
3. Sets up Iteration Paths for the team Demo
4. Sets up the default Area Path for the team Demo
HTH 乾杯、タルン