How to Remove Authenticator (links to other pages):
Open the Google Authenticator app that you previously installed on your mobile device to retrieve a one-time verification code.
Turn on the device and use the one-time verification code it displays. The device will turn itself off once the code has expired.
If you’re using a computer you control (as opposed to someone else’s computer or a shared machine), you can tell our authentication service to not ask again for 30 days. Look for and select the “I trust this browser on this device” check box before you enter your one-time verification code.
This feature uses a cookie to remember your device. The cookie itself does not contain any information about you or the device you are using. Instead, it verifies that you are using a device you have previously registered.
Remember to only use this feature for browsers on devices that are not shared with other people such as your personal office workstation, personal laptop or mobile device.
You can add your browser to the trusted list by selecting "I trust this browser on this device. Don't ask for codes again" when entering a verification code.
To remove devices from your set of trusted devices:
If you are prompted to enter a verification code despite having selected “I trust this browser on this device. Don’t ask for codes again”, try the following solutions:
The “trust this browser” option will not work if your browser does not have cookies enabled, is set to delete cookies after a certain period of time or is set to delete cookies every time you quit the browser.
If you use different browsers or devices, each one needs to be designated as a trusted browser or device the first time you sign in on it. For example, trusting Chrome on your desktop does not automatically mean Chrome is trusted on your laptop or mobile device - you must select “I trust this browser on this device. Don’t ask for codes again.” for Chrome on every device you decide to sign in from.
Incognito or private browsing windows can't access existing cookies from other browser sessions on your device, so it won’t know if you’ve previously designated the browser as trusted. If you want to utilize the “trust this browser” option, sign into CAS using a regular browsing window.
Some email clients support two-factor with IMAP. Check your email software to see if OAuth 2.0 is an option in your software’s IMAP configuration. If it isn’t, then use an application specific password - we call it a “Google token.” A Google token is more secure than your regular password.
Some email clients support two-factor with IMAP. Check your email software to see if OAuth 2.0 is an option in your software’s IMAP configuration. If it isn’t, then use an application-specific password, which is more secure than your regular password - we call it a Google token. For help setting this up, see our Getting a Google Token page.