Use the Team Foundation Unlock action to unlock previously locked files.
Working Folder
Specify a working folder for the action. The working folder specifies the context for the Team Foundation server, project and repository (working folders can be configured in Visual Studio or with the Options, or a specific folder for the action.
Files and Directories to Unlock
Specify a list of files and directories to unlock. Put each file/directory on a new line. Use wildcards (*) to specify groups of files.