The error AADSTS5000225: This tenant has been blocked due to inactivity means the Microsoft Entra/Azure tenant is in an inactive state and sign-in is intentionally blocked.

Key points from the tenant lifecycle behavior:

• When a tenant is marked inactive, sign-in attempts return AADSTS5000225.
• Administrators can request reactivation only within 20 days of the tenant entering the inactive state.
• After 20 days in this blocked state, the tenant is deleted and cannot be recovered.

To try to regain access, follow these paths depending on role and timing:

1. If an administrator for the tenant and it has been less than 20 days since it was blocked
   1. Contact Microsoft using the global support phone numbers listed under “Administrators” in the tenant inactivity guidance: see the “Tenant inaccessible due to inactivity” article.
   2. Open a single support case and wait for the decision; do not submit multiple requests while one is in progress.
2. If not an admin, or unsure who the admin is
   • Contact the organization’s global admin or internal support and have them open a support case with Microsoft as described above.
3. If the tenant has been blocked for more than 20 days
   • The tenant is deleted and cannot be restored. In that case, the only way to continue using Azure is to create or use a different tenant/account.

Additional practical options shown in similar cases:

• Some users with free Azure accounts have resolved access by going to the Azure signup flow (https://signup.azure.com in the referenced case) in a clean/incognito browser session and following the prompts to “upgrade” or continue their existing free account. This worked when the system recognized an existing free subscription rather than a fully deleted tenant.
• If browser/session issues are suspected, sign out of all Microsoft accounts and clear site data/cookies, then try signing in again.

If the tenant is still within the 20‑day window, the decisive step is contacting Microsoft support (or having the tenant admin do so) and requesting reactivation under the “tenant inaccessible due to inactivity” process. If it is beyond that window, a new tenant must be used for Azure.

References:

• Tenant inaccessible due to inactivity
• 7 Day Old Azure Account: AADSTS5000225: This tenant has been blocked due to inactivity. - Microsoft Q&A
• Error message: AADSTS5000225: This tenant has been blocked due to inactivity. - Microsoft Q&A
• Error message: interaction_required: AADSTS5000225: This tenant has been blocked due to inactivity - Microsoft Q&A