The error AADSTS5000225: This tenant has been blocked due to inactivity means the Azure AD tenant associated with the Hotmail/Microsoft account has been put into an inactive state. When a tenant is inactive, sign-in to Azure resources (including where Git repos are hosted in that tenant) is blocked.

To attempt recovery of the tenant and regain access:

1. Reactivate the inactive tenant (within 20 days)
   • Administrators can request reactivation of a tenant that has been blocked due to inactivity within 20 days of it entering the inactive state. After 20 days, the tenant is deleted and cannot be recovered.
   • The tenant administrator must contact Microsoft support using the global support phone numbers to request tenant reactivation, as described in the guidance: “Administrators can request a tenant to be reactivated within 20 days of the tenant entering an inactive state. Tenants that remain in this state for longer than 20 days are deleted. If you need to reactivate your tenant: The tenant administrator can reach out to Microsoft, see the global support phone numbers.”
2. Try signing in directly with the tenant context
   • If the tenant is still recoverable, sign-in can sometimes succeed by explicitly targeting the tenant:
     • https://portal.azure.com/<TenantId>
     • or https://portal.azure.com/<yourTenantName>.onmicrosoft.com
   • Use the tenant ID or the <yourTenantName>.onmicrosoft.com domain associated with the account.
3. If the tenant cannot be reactivated
   • If Microsoft support confirms the tenant has been deleted (more than 20 days in inactive state), the Azure AD tenant and its resources, including Azure DevOps or other Git repositories hosted in that tenant, are not recoverable.
   • In that case, a new tenant and/or Microsoft account must be created, and repositories must be recreated from any local clones or backups that may exist.
4. If sign-in issues persist but tenant is active
   • If the account is also used for Outlook.com/Hotmail and appears blocked due to unusual activity, use the Sign-in Helper to unblock the Microsoft account and follow the “When you can't sign in to your Microsoft account” flow:
     • Use the Sign-in Helper to unblock the account.
     • If that fails, follow the guidance under “When you can't sign in to your Microsoft account” to reset the password or contact support.

Given the specific AADSTS5000225 message, the key action is for the tenant administrator to contact Microsoft support immediately to request tenant reactivation, and to do so within the 20‑day window. Once the tenant is reactivated and sign-in works again, access to the Git repository (if it still exists in that tenant) should be restored.

References:

• 7 Day Old Azure Account: AADSTS5000225: This tenant has been blocked due to inactivity. - Microsoft Q&A
• Unblock my Outlook.com account