Windchill administrator should have possibility to undo chekout as mass if neccessary. Worked in PDMlink 9.1...in 10.0 only one CAD object at the time + collector.
In our case user does not work in our company anymore and left over 3000 objects as checked out. As a workaround it was suggested that change user password as admin as desired and log in as user. Unfortunately our passwords comes from AD so it were a byrocracy mess to get that user password reseted.
Eventhought deleting user from Windchill would undo checkout for all that users reserved CAD objects --> Does not work in case that user is on vacation. Also deleting users workspace would not be suitable in this case --> Local workspace can include multiple new objects.