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"SSO" stands for "Single Sign-On" and it allows you to use your STScI SSO credentials to log on to most web-based services at the Institute. Rather than have each service maintain separate user accounts, you log in through the SSO Portal. This should all happen seamlessly in the background. A primary benefit is that you only need to remember one user name and password.


You will be forwarded to the SSO Portal Login page, and you'll have to restart the clock by logging in, which sets up your first a new 9-hour sliding window.

  • I am logging in with the correct information, and I can't log in. What should I do?


Institute employees should use their AD credentials. For further instructions, see How to Change Your Pasword.