If you use the Gmail app on your iPad or Phone you will need to remove your @idahocom.org before you add your @icom.edu account.
Tap on your profile picture (or initial) above your list of emails
Select "Manage your Google Account"
Select "Remove from this device"
To add your @icom.edu account, select "Sign In"
To set up your account, you need to sign into the account in a browser. Select "Continue"
Type in your new @icom.edu account and select next. On the next page it will ask for your password, it is the same Jumpcloud password.