Editing the site requires accessing specific web pages, listed here.

To be prompted to log on, and to edit News and Announcements:

auth.cas.commonspotcloud.com/departments/chemistry/login.cfm

It used to be <http://author.as.cornell.edu/departments/chemistry/manage>, FWIW.

To edit the home page itself:

http://auth.cas.commonspotcloud.com/departments/chemistry/

But must log-on first for this to work (see above).