Tenant appears to be a Conditional Access lockout of the sole administrator account.

Bill Young 20 Reputation points
2026-11-12T08:54:56.99+00:00

Tenant: 4blvb0s.onmicrosoft.com

Admin User: [Moderator note: Personally Identifiable Information removed]

Error Code: AADSTS53003

Request ID: [Moderator note: Personally Identifiable Information removed]

Correlation ID:[Moderator note: Personally Identifiable Information removed]

Issue:

New Microsoft 365 Developer Program E5 sandbox provisioned successfully.

The only Global Administrator account is unable to complete first-time security registration.

Flow:

Let's keep your account secure

→ Next

→ Your sign-in was successful but does not meet the criteria to access this resource

→ AADSTS53003

Unable to access:

  • admin.microsoft.com
  • entra.microsoft.com
  • mysignins.microsoft.com/security-info

This appears to be a Conditional Access lockout of the sole administrator account.

Microsoft 365 and Office | Development | Microsoft 365 Developer Program
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Answer accepted by question author
Helen Luu 3,735 Reputation points Independent Advisor
2026-11-12T10:02:27.0466667+00:00

Hello @Bill Young

In this situation, please try using the same device and network that were used to create the tenant originally. If the issue persists and you are the only administrator of the tenant, you will need to contact Microsoft Support for further investigation and assistance. Please locate the appropriate Microsoft support hotline for work account and contact the frontline support team so they can raise a ticket on your behalf: Customer service phone numbers - Microsoft Support   

Please note that this is a user-to-user support forum. Only Data Protection team can help you to revoke the session and reset your password, account, MFA...

Here are some tips and an example of a prompt to help you navigate the IVR more effectively:

(While calling, you can ignore the 30-second introduction that says "you can visit the link..." and wait until you are presented with the options. Press "1" as a business email user, and again "1" for technical help.)

In some regions, the initial interaction may be automated, here’s a general idea of how the conversation might go to help you prepare:

  • What kind of problem are you experiencing?
  • Answer: Authenticator
  • What products do you use?
  • Answer: Office 365 for business
  • Is this for an education or company account?
  • Answer: For companies
  • Are you an administrator?
  • Answer: Yes
  • Are there any other administrators in your organization?
  • Answer: No. I am the only admin in my tenant
  • Do you need a... Service request?
  • Answer: Yes. I need to create a ticket.

I hope this information helps you move forward with your support request and that the issue can be resolved soon. If you have any further concerns or issues while reaching out to the Microsoft Support team, please feel free to share with me.

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