The error interaction_required: AADSTS5000225: This tenant has been blocked due to inactivity indicates that the Microsoft Entra tenant is in an inaccessible state due to inactivity.

Key points from the tenant lifecycle behavior:

• When a tenant is marked inactive, sign-in is blocked and this error is expected.
• Administrators have up to 20 days from when the tenant becomes inactive to request reactivation.
• If the tenant remains inactive for more than 20 days, it is deleted and cannot be recovered.

To proceed, depending on the situation:

1. If tenant reactivation is needed
   • A tenant administrator must contact Microsoft support to request reactivation. Use the global support phone numbers listed in the documentation.
   • Do not submit multiple support requests for the same issue; wait for a decision on the existing case.
2. If the tenant is no longer needed
   • No action is required. After 20 days in the inaccessible state, the tenant is deleted and cannot be restored.
   • Review Microsoft’s data protection policies if data handling and retention are a concern.
3. If accessing Azure portal is required for a still-active tenant
   • Try signing in directly to the tenant in Azure portal using the tenant ID or tenant name in the URL, for example:
     • https://portal.azure.com/<TenantId>
     • https://portal.azure.com/<yourTenantName>.onmicrosoft.com

If the tenant is already beyond the 20‑day window and deleted, a new tenant must be created to continue using Microsoft Entra ID and Azure services.

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