Undo other users checkout

1. Log in as Tfs Admin

2. Launch Visual studio command prompt

3. use the below Undo workspace command.

tf undo /workspace:userxyzworkpacename "$/Silver/Documents/Project Management/Sprint 12/*.*" /s:https://servername:8080/TFS/[ProjectCollectionName]

4.For recursively deleting all files under the folder use

tf undo /workspace:userxyzworkpacename "$/Silver/Documents/Project Management/Sprint 12/" /s:https://servername:8080/TFS/[ProjectCollectionName] /RECURSIVE