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Office and Office 365

When I try to run an Office app (PowerPoint, Word, Excel, etc...), it says "You can't make this change because this selection is locked."

To use Office 365, the newer version of Office installed on many of our computers, you must sign onto it once before you use it for the first time.  This message indicates that Office has basically forgotten to ask you to sign on.

To fix this, go in the Office app, for instance, Word, to the File menu (top left area of Word).  In the column on the left side, select "Account" (near the bottom).  A link will appear that will allow you to sign into Office.

When I try to run an Office app (PowerPoint, Word, Excel, etc...), it wants me to sign on

Office 365 is a new version of Microsoft’s Office suite, which requires users working on college owned lab, podium, and virtual lab machines to sign on once before using it.

By signing onto Office 365, you activate it for your user. The activation token is stored in your H: drive, so that if you reopen an Office app on any other college owned lab, podium, or virtual lab machine, you do not have to do a full sign-on a second time (although Duo may ask you to re-authenticate occasionally).

If you see this message, you need to sign in to Office:

Signon Prompt

Click “Sign in” and provide your William & Mary email address (which will end in or, depending on what you were assigned), as in this example:

Provide email

This should take you to our Central Authentication Service (CAS). Enter your username and your William & Mary password, as in this example:

Provide username and password

DUO two-factor authentication might appear:


Authenticate through DUO.  A screen will appear briefly that says "Getting Office Ready for You...".  When that disappears, you should be able to use Office 365 normally.  You should not need to go through the full log in again whether you use other Office 365 Apps (such as PowerPoint or Excel) or whether you sign onto another lab or podium computer.

However, Office may ask you to go through Duo again, occasionally.  If you see a warning in the upper right corner of your Office app (Word, Excel, PowerPoint, etc...), click on it, and then on the "sign in" link to authenticate with Duo again:

Reauth with Office and Duo


The warning should go away:


Questions? Contact the Technology Support Center (TSC)
757-221-4357 (HELP) | [[w|support]] | Jones 201, Monday - Friday, 8:00 am - 5:00 pm