Hi ,

I'm Dyari. Thanks for reaching out. I will be happy to assist you in this regard.

This error means the tenant itself has been blocked due to long-term inactivity, as the Q&A Assist has mentioned.

Once blocked, actions like password resets, MFA changes, or using InPrivate mode will not help. To resolve this, a Global Administrator must contact Microsoft Support to request reactivation. If the tenant has been inactive for too long, reactivation may not be possible and creating a new tenant will be required.

The error message you're encountering, AADSTS5000225: This tenant has been blocked due to inactivity, indicates that your Azure tenant has been disabled due to a lack of activity. This can happen if the account has not been used for an extended period. To resolve this issue, you may need to upgrade your account or reactivate it by logging in through the Azure signup page. Using an incognito window in your browser can help ensure that no cached data interferes with the login process.

If you continue to face issues, consider checking the tenant lifecycle policies or contacting support for further assistance.

References:

• Your sign-in was blocked
• How to troubleshoot Microsoft Entra sign-in errors