Using Classic Outlook on Windows for personal email, calendar, and contact management
Hi @Mark Martin
The “Work or personal” message means Microsoft still detects both account types associated with that email address. Personal and work or school accounts are separate, even when they use the same address.
Since the message appears at startup and removing Outlook did not help, first check Settings > Accounts > Email & accounts and Settings > Accounts > Access work or school. Remove or disconnect the old address wherever it appears, then restart the computer.
If it is not shown in either place, please confirm whether the prompt appears before the desktop loads or shortly afterward.
Thank you so much for your time and I hope you have a good day!