Receiving this notice today with Outlook, Word, and Excel:
Searched google and…
This Microsoft link explains the error, but I believe we are good with payment.
This link provided some more reasonable fix to the issue.
After reboot, the error persisted.
This link provided some additional steps. Be sure to view to step 4 to clean up stored credentials for Office apps.
After the removal of the stored office credentials a restart was conducted. Upon login, I was prompted to login to 3-4 various Office 365 resources and no longer received the original account notice.
ISSUE RESOLVED! Thanks google and peeps!