Central Authentication Service (CAS)
Frequently Asked Questions

  1. What is CAS 
  2. What is single sign on for Web applications? 
  3. Why should I close my browser when I am done? 
  4. How do I logout of CAS on a Mac? 
  5. I authenticated using Firefox, but when I also run Internet Explorer, why does it ask to be authenticated again? 
  6. Authentication versus authorization 
  7. What applications are CAS enabled? 
  8. What is the password reset requirement? 
  9. Why do I receive an error message trying to access two OWA email accounts? 
  10. Why don't I see the option to use the light version of Outlook Web App on my account's sign-in page? 
  11. How can I change the size of text on a web page? 
  12. How can I change the size of text and images on a webpage? 
  13. Are there any restrictions for creating a password? 
  1. What is CAS?
    • CAS stands for Central Authentication Service which was originally developed by Yale University. It provides a single authentication session to multiple web applications.

    [Return to Top]

     
  2. What is single sign on for Web applications?
    • Single sign-on for is an authentication process that allows a user to provide their username and password once in order to access multiple applications.

    [Return to Top]

     
  3. Why should I close my browser when I am done? 
    • When you login to CAS, a cookie is stored in your browser that allows you to be automatically logged in to other sites. This cookie is set to expire at the end of your browser's session. So, when you close your browser, this cookie no longer exists and you can no longer be automatically be logged in to any more sites without specifying your password again.To ensure security to the system please close all of your web browsers when you have completed your work.

[Return to Top

  1. How do I logout of CAS on a Mac? 
    • To fully quit a browser application such as Safari or Chrome, you need to choose the Quit command from the application menu.  Another way to quit a browser application is to use the Command-Q keyboard shortcut when the application is in the forefront (its name is next to the Apple menu) or by right-clicking on the Dock icon.To ensure security to the system please close all of your web browsers when you have completed your work.

[Return to Top]

  1. I authenticated using Firefox, but when I also run Internet Explorer, why does it ask me to be authenticated again?
    • Authentication is valid for a single browser. If you use two browsers or browsers on different machines, you need to authenticate again inside each browser.

    [Return to Top]

     
  2. Authentication versus authorization 
    • Authentication is proving that you are who you say you are. Authorization is determining whether a proven person is authorized to access something, such as a web application. CAS handles authentication. CAS does not handle authorization to individual services.  You must be authorized to use each web application.

[Return to Top]

  1. What applications are CAS enabled?

    The following applications have been CAS enabled:
    • Outlook Web App (OWA) – is a webmail service used to access e-mail, calendars, contacts, and tasks via your browser
    • EZ-Proxy - is a web proxy server used by libraries to give access from outside the library's computer network.  This allows library patrons at home or elsewhere to login through their library's EZproxy server and gain access to bibliographic databases
    • PeopleAdmin – is a Human Resource applicant tracking software application
    • WebAdvisor - provides access to common OCC student and employee transactions and administrative information using a web interface.

      [Return to Top]

     
  2. What is the password reset requirement?

    • All passwords will expire after 180 days and must be reset to a new password. You will receive a warning message before your password expires so you can change it by clicking the Change Password button.

      You may change your password any time before the 180 day expiration.
     

[Return to Top]

 

  1. Why do I receive an error message trying to access two OWA email accounts?


    "There was a problem opening your mailbox. You may have already signed in to Outlook Web App on a different browser tab.”
     
    • If you authenticated using Internet Explorer version 8 and started Outlook Web App (OWA) and then try to access another email account,  you will receive an error message because the browser cookies cannot be shared between two instances of IE running in a tab or window.
       

      You can open a second OWA account, in IE 8 or above, by clicking the File menu and selecting the "New Session" item; a new browser window will open. The new browser window will not share session cookies with the original browser window, so you can log into OWA (and most web applications) as a different user.
       

      [Return to Top]

       

  2. Why don't I see the option to use the light version of Outlook Web App anymore?
    • If your Web browser is Internet Explorer 5 or earlier, you will automatically be using the light version of Outlook Web App by default. You receive the Premium interface when you are using Internet Explorer 6 and above, Firefox 3 and above, Safari 3 and above on a Mac, and Google Chrome 5 and above. 

      You can change from the premium version to the light version of Outlook Web App by following these steps.
      1. Sign in to your account.
      2. In your account, click the Options drop-down arrow and select See All Options, and then click Settings and then General
      3. Under Accessibility, select the Use the blind and low vision experience check box. 

    [Return to Top]

     

     
  1. How can I change the size of text on a web page? 
    • To change the size of text on a webpage, without changing the size of the images, use the browser settings. The following instructions describe how to change the text size in some popular web browsers.
      Note: Changing the text size may cause some webpages to render incorrectly in your browser.

       

      Internet Explorer 8 

      1. Click Page at the top of the browser window, and then click Text Size.
      2. Choose the text size that you want.

      Internet Explorer 9 

      1. Make sure you can see the command bar. If you can’t see it, place your mouse pointer in the blank area to the right of the tabs, right-click, and then choose Command bar.
      2. On the command bar, click Page, and then click Text Size.

       IE 9 Command Bar 

      1. Choose the text size that you want.

      Firefox 

      1. Make sure you can see the menu bar. If you can't see it, place your mouse pointer in the blank area to the right of the tabs, right-click, and then choose Menu Bar.
      2. On the Menu Bar, click View, and then mouse over Zoom.
      3. In the Zoom menu, select Zoom Text Only and then click Zoom In or Zoom Out. To return the text to the original size, click Reset.

      Chrome 

      1. Click the wrench icon in the upper-right corner of the browser window, and then click Options.
      2. On the Options page, click Under the Hood and go to the Web Content section.
      3. In the Font size list, choose the text size you want.

      Safari 

      1. Click the page icon in the upper-right corner of the browser window, and then mouse over Zoom.
      2. In the Zoom menu, select Zoom Text Only and then click Zoom In or Zoom Out. To return the text to the original size, click Actual Size.

       


       

      [Return to Top]

       

  1. How can I change the size of text and images on a webpage? 
    • Zoom increases or decreases the size of everything on a webpage, including text and images. To change or reset the amount a webpage is zoomed in or out, use these keyboard shortcuts:

      • Zoom in: Ctrl + (Plus Sign)
      • Zoom out: Ctrl – (Minus Sign)
      • Reset page size to 100%: Ctrl+0 (Zero)
       

[Return to Top]

 

  1. Are there any restrictions for creating a password?
    • Yes, do not use any of the following special characters in your password. 
      • " double quotes
      • < less than
      • @ at sign
      • & ampersand
      • + plus sign