What's supposed to happen when (ADFS SAML SSO and Kerberos)

[Dieselboy]

Say you sign in, using a web browser to an application which forwards you to ADFS 2.0. You authenticate and obtain a kerberos ticket.

Kerberos ticket lifetime = 10 hours
SAML SSO lifetime = 1440 minutes (24 hours)

When the Kerberos ticket expires, but you're still using the application - what happens? Will it prompt for re-auth, or silently renew?