Hi,
We're using sharepoint 2013 online in a corporate environment with internet explorer 8.
In general things are working OK; however every time when a user tries to open a document following login box and javascript error appear (both excel and word show same behaviour).
Note that the users are already signed in on the sharepoint site when this error appears (they just click on edit document). Clicking the javascript error away does unfortunately always result in the document opening. Any help would be appreciated!