var projectCollection = TfsTeamProjectCollectionFactory.GetTeamProjectCollection(new Uri(tfsURL + "/" + collectionName));
var myService = projectCollection.GetService<TswaClientHyperlinkService>();
string wiURL = myService.GetWorkItemEditorUrl(workItem.Id).ToString();

Soultion
Follow the below steps on the build agents
• Go to Start->Programs->Microsoft Team Foundation Server 2010/ 2012 ->Team Foundation Administration Console
• Select a build agent and click Properties
• Change the working directory from to $(SystemDrive) to D:, E: etc depending upon the free disk drive

Explanation

TFS Service account requires the follwoing permissions on TFS - Share Point DBs

Explanation
The users should have project level permission to label any folders and files in version control using visual studio IDE. The error occurs when team project does not have project users/groups permissions set at project level but its set on folders.

Solution
Add the users/groups permission at project level.

Explanation

Expected behavior in TFS web access as there are no display filter for MS office files. There are only three default display filters configured to open plain text (.CS, .proj etc.) and images on the browser. The display filter is used to display files on the web page. For the other kind of files, TFS web access cannot display them in the web page, instead it provides link for user to download it.

Reference

MimeMap.XML location: C:\Program Files\Microsoft Team Foundation Server 2010\Application Tier\Web Access\Web\App_Data

    <Extension name=".doc" content-type="application/msword"/>
    <Extension name=".pptx" content-type="application/vnd.ms-powerpoint"/>
    <Extension name=".pps" content-type="application/vnd.ms-powerpoint"/>
    <Extension name=".pdf" content-type="application/pdf"/>
    <Extension name=".docx" content-type="application/msword"/>