Are you sure that you want to remove this Web application from Team Foundation Server? If you do so, any project sites contained ...

Are you sure that you want to remove this Web application from Team Foundation Server? If you do so, any project sites contained in this Web application will be detached and no longer accessible to users, and reports and dashboards will not be updated. If you are not sure, click No, click Change SharePoint Web Application, and then review the projects that will be affected by this change.

If you remove the Web application, make sure that you remove the service account for the Web application from the {0} group in Team Foundation Server.