Calendar notifications appearing from outside source
How do I block some calendar notifications pouring into my iPhone. Should I be concerned that it is warning me about a virus.
iPhone 7, iOS 14
If running iOS 13 or earlier versions, check: Settings - Passwords & Accounts - Accounts - Any rogue entries here? If so, delete the rogue account.
If running iOS 14, check: Settings - Calendar - Accounts - Any rogue entries here? If so, delete the rogue account.
The Apple support article is below.