Well, the good folks at Microsoft have created an update that makes Remote Desktop more secure.  However, this does cause some access issues.

If you are showing Sentinel\username for your username, please change it to instructional\username (or click Options and enter Instructional\[username] in the username field - replace [username] with your username).

If you have the option to save your password, please do so, unless you're on a public or shared computer where this would be a security issue.

*If you get a pop-up warning saying the Remote Desktop Connection cannot verify the identity of the computer you are connecting to...Do you want to connect anyway? Click Yes (This message displays because Sentinel is not a Vista server.)

Mac Users - You must have the latest version of Microsoft Remote Desktop for Mac.  You can download this from the Mac store.  Additional details can be found here.