I use more than one device to access NCEdCloud. Will I need to setup two different authentication applications?

The One-Time Password (OTP) is tied to your NCEdCloud ACCOUNT, not to a device.  Therefore, when you login the first time after MFA is implemented (or after an OTP Reset) and see the OTP Setup Page, the QR Code and the AlphaNumeric Code below it are what links the NCEdCloud MFA to the 6-digit code presented by your authentication application (Google Authenticator, RapidIdentity, Authy Desktop).  The QR code and the AlphaNumeric Code are "identical", as far as providing the same information to authentication apps - as long as they're taken from the same OTP Setup page.  Therefore, you can use the authentication app on your phone to login to your iPad or your Windows machine at any time during the day, but because you are likely to login at different times, the 6-digit code you will be entering will be different.