Deleted Samsung email account, keeps asking for password

[Android Central Question]

My organization has switched corporate email to Outlook. Most users used Samsung Email before. I went into Samsung email and removed the corporate email. Downloaded Outlook and setup their accounts there.
Every Android phone is popping up a notification at least once a day, asking for the password of the account I removed.
I can go into Apps on my personal device and see that under Notifications, there is a reference to the account I deleted. I cannot seem to get rid of it.