TF214025: No build service host was found

Description

We have 2 build servers (TFS 2015.1) run using a domain account called DOMAIN\TFSBuildService. Two months run without issue. One day build controllers stopped with same error per controller:

Exception Message: TF214025: No build service host was found with the URI vstfs:///Build/ServiceHost/16. Either the URI does not exist, or DOMAIN\TFSBuildService does not have permission to access it. (type BuildServiceHostNotFoundForUriException)

Solution

Add build account to Advanced group on "Aceess Levels" tab in yout TFS site http://yourTFSServer:8080/tfs/_admin/_licenses

/Geecoholic