In Order to use your Google Drive for desktop (via the Finder) in the new icom.edu domain, you need to sign out of your idahocom.org Google Drive.
Google Drive in Finder
Click on the Google Drive Icon in the menu at the top right of your display
Click on the Cog Wheel in the upper right of the window
Choose "Preferences" from the menu
Click on the Cog Wheel in the upper right of the window.
Select the "Disconnect account"
Once your account has been disconnected, you will get a new window asking you to sign in. It can take a minute or two.
Sign in with your icon.edu account.