Getting notifications from the Mail app on Windows 10 that it couldn't sync email for old TTU account

Symptoms

Because your eRaider and TechMail account is either disabled or deleted, the Windows 10 Mail app is not able to sync with TechMail any longer.

Cause

Disconnect your TTU account from Windows 10.

Outcome

The notifications should stop.

Resolution

Your eRaider and TechMail account was either disabled or deleted. However, you are continually receiving notifications from the Mail program in Windows 10 that it cannot sync mail.