Using Classic Outlook on Windows for personal email, calendar, and contact management
Hi, I'm Julian. To fix this, you'll need to verify your identity and secure the account. Please try the following steps:
- Sign in and go through the Microsoft Account Recovery and security verification. Click here https://account.live.com/acsr.
- Check this link for guidance on how to restore access https://support.microsoft.com/en-us/office/unblock-my-outlook-com-account-f4ad2701-d166-4d8b-8a6a-9af2a1f8a4c4.
If you continue to get blocked immediately, it may help to try signing in from a different device or network.
Have you tried completing the security verification steps when Outlook showed that message, or were you unable to get past it at all?