1. Download the Windows Server 2003 Resource Kit
http://www.microsoft.com/downloads/en/details.aspx?FamilyID=9d467a69-57ff-4ae7-96ee-b18c4790cffd&displaylang=en
2. Install the Windows Server 2003 Resource Kit: C:\Program Files\Windows Resource Kits\Tools
4. Klist tickets: Display all the Kerberos Tickets on the Machine
5. Klist tgt: Displays the TGT Ticket given to the Machine
6. Klist Purge: Purges the Tickets of the Machine
For every ticket that is available on the machine, you will get a prompt to delete the ticket or not. So the command will not delete all the tickets in one go.