Visual Studio Team Services (VSTS) has been renamed to Azure DevOps as of September 2018. Microsoft offers guidance on conversion from Team Foundation Server (TFS) to Azure DevOps Services.  Features within VSTS have been given new Azure DevOp names as well.

User settings can be changed by logging into app.vsaex.visualstudio.com.

Documentation regarding Azure DevOps is available at docs.microsoft.com/en-us/azure/devops/.