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:

• Video tutorial (includes re-syncing and re-sharing)
• An instructional PDF for re-syncing your personal OneDrive
• An instructional PDF for re-syncing Group OneDrive folders (document libraries in Teams, SharePoint, etc.)
• An instructional PDF for re-sharing files from your personal OneDrive (web version and local OneDrive files)

For Mac users, here's a link to the following Microsoft support document: Fix OneDrive sync problems on a Mac