Create a Collection-Level Group
Creating a collection-level group is an efficient way to grant a specific set of permissions to a group of people for a team project collection. If you want to create a group for your team project, see Create a Team Project Group. Make sure that you allow only the minimum permissions necessary for the group, and add only those users or groups who must belong to this new collection-level group. If this group requires a high level of permissions but is project-specific, consider creating a team project group instead.
If you create a group in Team Foundation Server, you do not automatically create any groups or grant permissions in other components that might support this collection. These components include SQL Server Reporting Services or SharePoint Products.
To perform this procedure, you must be a member of the Team Foundation Administrators group. For more information about permissions, see Team Foundation Server Permissions.
To create a collection-level group
In Team Explorer, select the team project collection for which you want to create a server-level group.
On the Team menu, point to Team Project Collection Settings, and then click Group Membership.
In the Global Groups dialog box, click New.
In the Create New Team Foundation Server Group dialog box, in the Group Name box, type the name for the team project group.
In the Description box, optionally type a description for the group, and then click OK.
After you have created a collection-level group, you must add the newly created group to the collection in the Security dialog box, give the group the appropriate permissions, and then add members to the group. By default, a new group is created without any permissions and without any users belonging to it.