As part of the email change to @arizona.edu, you need to to re-establish your OneDrive Sync settings and re-share the files that have been shared from your personal OneDrive.
Note: OneDrive files shared from collaboratively-owned document libraries located in Teams and SharePoint are not affected.
For Windows users, this article includes:
For Mac users, here's a link to the following Microsoft support document: Fix OneDrive sync problems on a Mac