TL;DR; Explains the TF14002 error in TeamPlain, where NT AUTHORITY\NETWORK SERVICE lacks valid user group access, and discusses possible causes like proxy server settings.

Some prople have encountered this error when viewing the source control tab in TeamPlain:
System.Web.Services.Protocols.SoapException: TF14002: The identity NT AUTHORITYNETWORK SERVICE is not a member of the Team Foundation Valid Users group.
at Microsoft. TeamFoundation. VersionControl. Server. Repository. GetRepositoryProperties()
Now in the TeamPlain forums a couple of posts defign the problem, but no solution:
SoapException with Source tab posted 03-27-2007 4:39 AM
TF14002: The identity NT AUTHORITYNETWORK SERVICE is not a member of the Team Foundation Valid Users group. posted 05-17-2006, 4:31 AM
1.1 Problems posted 10-14-2006, 12:37 AM
It seams that this is an internitant problem and may be caused by proxy server settings.
This has only hapened to one of my users sos far and not to me at all.
We will see…
Technorati Tags: ALM
If you've made it this far, it's worth connecting with our principal consultant and coach, Martin Hinshelwood, for a 30-minute 'ask me anything' call.
We partner with businesses across diverse industries, including finance, insurance, healthcare, pharmaceuticals, technology, engineering, transportation, hospitality, entertainment, legal, government, and military sectors.

Microsoft
CR2

Schlumberger

Akaditi

New Signature

Xceptor - Process and Data Automation

Ericson

Genus Breeding Ltd

Jack Links

Qualco

Graham & Brown

Hubtel Ghana

Teleplan

ALS Life Sciences

Big Data for Humans

Epic Games

Slicedbread

YearUp.org

Washington Department of Transport

Department of Work and Pensions (UK)

New Hampshire Supreme Court

Ghana Police Service

Washington Department of Enterprise Services

Nottingham County Council

Schlumberger

Philips

YearUp.org

Epic Games

Sage

Milliman