When you receive the email telling you that "your WIT presentation has been published", you may have experienced an issue trying to open the presentation when clicking on the link and selecting to "Open" the presentation from the popup shown below:
If it is Internet Explorer that you are using, the chances are that when you click on "Open", PowerPoint will try to open the file but fail, showing an error message like the one below rather than the presentation:
This is an issue with Internet Explorer. It has trouble trying to save files like this from a web address that starts with "https" to its Temporary Internet Files folder on your computer (which is where it tries to automatically save the file when you choose the "Open" option).
If you do experience this issue, you can still get access to your presentation by saving the file to your computer first, using either the "Save" or the "Save as" option, then opening up the presentation from your computer. PowerPoint should have no trouble opening it then.