Is there a script that can be run when moving an email between tenants so it logs into the correct one?

So recently we did a Tenant-to-Tenant email migration. Users had planned to keep their email addresses between the move. That worked fine, and people can login via the web without issue, on the phone they can remove the existing account and add a new one, and on new systems can add it to Outlook. However on any Outlook desktop (Mac or PC) that had the account before if they try removing and reading it keeps on trying to log into the old tenant.

So I am wondering if there is a scripts for PC and Mac that will allow me to wipe out that old information that Outlook/Microsoft keeps trying to add back in?