A knowledge base article about How do I extend my guest account? provided by the UC Berkeley IT Service Hub - Knowledge Portal
When your guest account expires, you will no longer be able to log in. If you still need to log in, reach out to your sponsor for help. Instructions for your sponsor to extend your account are available on our website at this link.
Even if guest account has expired, your sponsor will still be able to renew your account.
Further instructions for sponsors can be found at this link.