"This GUI tool displays ticket information for a computer running the Microsoft implementation of Kerberos V5 protocol.
You can view and purge the ticket cache by using the KerbTray tool icon located in the status area of the desktop. You can see the time left on the initial ticket-granting ticket (TGT) before it expires by positioning the cursor over the icon. The icon also changes in the last hour before the Local Security Authority (LSA) renews the ticket.
NOTE: You receive the initial ticket-granting ticket (TGT) when you first log on to the Windows 2000 domain, using your account."