Empty groups not being expanded in a combobox for a TFS work item
A common work item type (WIT) edit in TFS is to limit the list of names shown in a combo to the users assigned to the project i.e. the members of the Team Projects Contributors and Project Administrators groups. This is done by editing the WIT either via your favourite XML editor or the Process Template Editor (part of the power tools). You edit the Allowedvalues for the field you wish to limit such as the Assigned To as shown below, ...