Important Reminder for Teachers College affiliates: Teachers College (TC) and Columbia University (CU) utilize different systems. Therefore, your password(s) are independent of one another and may be different. To access and submit a request for guest access to Columbia's campus, you must log in with your Columbia University credentials. You are encouraged to keep track of your password(s) using an electronic password manager, such as Bitwarden. Additionally, you will need to add Columbia to your DUO account for multi-factor authentication through CAS. Note, this is also different from TC which uses Okta.
For additional assistance managing your CU login credentials, see these resources from CUIT.