tfs-change the access level. Increase the team chat room function

reproduced from: https://msdn.microsoft.com/zh-CN/library/vstudio/jj159364 Visual Studio 2013Other versions

The access level allows groups of users to access functionality in Team WEB access (TFS) based on their license level when they work in their local deployment of the Foundation Server (TFS). Some features, such as chart authoring, test case management, and team chat rooms, require advanced access rights.

You set access levels only for local TFS. For Visual Studio Online, see Account License Control access to advanced features.

As an administrator, you assign a user or user group to one of the three access levels (basic, advanced, and stakeholder) based on the license owned by each user. With the release of TFS 2013 Update 4, the access level name has been renamed to match the Visual Studio Online license level. A special note is that the service account is added to the default access level. If you set the stakeholder to the default access level, you must add the TFS service account to the basic or advanced group.

Access level	Require license
Basic (previously standard)	TFS Client Access License (CAL) or Visual Studio Professional with MSDN subscriptions.
Advanced (previously Full)	One of the following MSDN subscriptions: Visual Studio Ultimate with MSDN , Visual Studio Premium with MSDN, MSDN platforms, or Visual Studio Test Professional with MSDN. The
"Stakeholder" (previously "limited")	Does not require a license.   Assign stakeholder access to customers or stakeholders that you want to collaborate with but are not on your team.

You can learn more about licensing from the Visual Studio and MSDN licensing white papers. to add a user or group to an access level

If you are managing access rights for large groups of users, it is a best practice to create Windows groups or TFS groups first, and then add individual accounts to these groups.

From the TFS home page (for example, Http://myserver:8080/tfs), go to the Server Administration page.

Select a level, and then add users or groups.

If you do not see the Access Level tab, you are not a TFS administrator or have no permissions. Here's how to get permissions. Quick reference to access levels and features

The following table indicates the features that users can access based on their access level. This information depends on your product version and may change at any time. The access level reflects the features supported by the TFS 2013.4 update. For a complete comparison of products and features, please go here.

Functional area	Relevant stakeholders	Basic	Senior
View and edit all work items	(1)
Standard function (2)
Agile Panel	(3)
Basic backlog (backlog) and Sprint planning tools	(4)
Agile Portfolio Management	(3)	(3)
Chart view
Chart authoring
Code
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