We just had a similar issue emerge at our institution. Here is an excerpt from one of those communications that may help others experiencing this:
This was posted in Microsoft’s KB only a couple months ago on April 23 and is identified as a “FAST PUBLISH”(information provided as-is in response to emerging issues), so this may still be an emerging issue.
I believe the username prompt is an issue caused by the integration of Internet Explorer and Word. Please see the following Microsoft Knowledge Base article: http://support.microsoft.com/kb/2019105
. It explains a possible cause, some client-side resolutions (look under “Method 2:Client approaches that can lessen the impact”), and links to more information. To summarize the cause listed in the article:
When Internet Explorer opens an Office document, it spawns the appropriate Office application passing the URL
to the document. The Office application then will attempt to access the document directly from the server. This is different from other browsers andother file types – most browsers download
the file and have the application open it from the local cache.
And the recommended client-side solutions:
- Leaving the application open – For those wishing to retain direct-editing functionality but for whom FBA with persistent cookies are not an option, the user's can reduce the impact of multiple prompts by leaving the application open after the first access is made. By closing only the document instead of the application another document using the same application can be opened without prompting for credentials since the executable has already been authenticated. Documents of different types requiring a different application to edit them will require a prompt for each new application that needs to access the site.
- Select "remember the password" –The credential prompts can also be less annoying if the user selects to remember the password. This should only be done if the client machine is in a private trusted environment and not used in a public machine (many corporations will set a policy that prohibits the saving of passwords). The saving of the password will not eliminate the prompt but will pre-populate it with the information so that only a single click/keystroke is needed to respond. The site should be added to the Trusted sites zone if this approach is used.
Anthony J. DeCusati
Learning Systems Manager