The Vacant Untenantable screen should only be used by your Chintaro System Administrator to correct the end date of a Room.  

From the System Maintenance Sub-Menu, click Vacant Untenantable Rooms.

The Vacant Untenantable Rooms screen will open:

Use the Filter at the top of the screen to filter the screen to the Room you want to change the End Date for. 

Enter the correct End Date.

Exit the screen to save the record.