If you are downloading a file (example: Word, Excel, PowerPoint, etc.) from within your course website, you may be prompted to login a second time depending on the version of Internet Explorer you are using - Internet Explorer has tightened their security settings.
To by-pass this second login, you can either save the file, then open it or click Cancel - you may have to do this more than once. Alternatively, you can go to Internet Options (top right - click on the cog icon) and change your Security setting to Medium-Low and your Privacy setting to Medium.
FireFox and Chrome are not generating this second login.
If you have questions or problems, please feel free to contact the Moodle Help Desk firstname.lastname@example.org or 1-877-489-2687 local 3737