Azure Tenant Blocked due to Inactivity (Error: AADSTS5000225) - Request for Restoration

I noticed that you posted your question in English, so I’ll continue communicating in English for clarity. However, if you would prefer to switch to Korean, please feel free to let me know and I’ll be happy to accommodate. Images I provide will also be displayed in English due to the testing environment I use. Thank you for your understanding. 

Hello 승원 윤,

The error AADSTS5000225 indicates that the Microsoft Entra tenant has been blocked due to inactivity. This issue cannot be resolved through the Community forum because reactivation requires Microsoft to review the tenant from the backend. Microsoft guidance indicates that administrators should request reactivation as soon as possible, as the recovery period may be limited. Please contact Microsoft Customer Support and ask the frontline agent to create a support ticket for the blocked tenant: Microsoft 고객 지원에 문의 | Microsoft Support

When you call the support number, you may hear an introduction of about 30 seconds such as "you can visit the link...". You can ignore this introduction and wait until you are presented with the options. Then press "1" as a business email user, and again "1" for technical help

I also recommend calling during business hours. In my experience, it can be difficult to get through to the correct support queue, and automated systems don't always work as expected. If you can't get through on your first try, I suggest trying again later or at a different time.

If you are unable to reach support via the phone numbers, there is a workaround you might consider: You can register for a new Microsoft 365 tenant by signing up for a trial subscription here: Microsoft 365 Enterprise: 플랜 및 가격 비교

Once the new tenant is created, you can access the admin center and submit a support ticket from there, requesting to speak with the Data Protection Team on behalf of your original tenant.    

When opening a support ticket, please make sure the Support Assistant (AI) in the Help panel is turned Off. Several customers have reported that the Contact Support option may not appear while the Support Assistant is enabled. Once the AI assistant is turned off, you should be able to enter a description of the issue and the Contact Support option will appear, allowing you to submit a ticket directly to Microsoft Support. 

Important notes:     

• This new trial tenant will not give you access to any of the data or settings in your original locked tenant. It is solely a temporary means to contact Microsoft support.    
• The resolution time might be longer as you are contacting support from a different tenant.    
• Remember to cancel the trial subscription for the new tenant once your issue with the original account is resolved to avoid any unintended charges: Microsoft 365 관리 센터 Microsoft 비즈니스 구독 취소 | Microsoft Learn

I hope the information provided helps guide you in the right direction. Although I’m unable to take direct action, I sincerely hope that the steps and recommendations I’ve shared can support you through the process.  

Warm regards,