Unable to access Microsoft 365 Developer E5 Sandbox due to MFA Error 50089 and unexpected 300GB storage limit

Question

Unable to access Microsoft 365 Developer E5 Sandbox due to MFA Error 50089 and unexpected 300GB storage limit

TRUNG TÂM DVVL BÌNH DƯƠNG 0

Hello Microsoft Team, I am the owner of a Microsoft 365 Developer Program sandbox. Developer Program Account: [Moderator note: Personally Identifiable Information removed] Tenant: [Moderator note: Personally Identifiable Information removed] Global Administrator:[Moderator note: Personally Identifiable Information removed]

I am experiencing two critical issues: 1. I cannot sign in to the Global Administrator account because MFA SMS verification immediately fails with Error Code 50089. 2. My Developer Dashboard shows an active Renewable E5 subscription with 84 days remaining, but SharePoint Admin Center reports that the tenant is limited to only 300 GB of pooled storage and all sites have become read-only. Could you please investigate both issues and advise how I can recover my administrator access and restore normal storage behavior?

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hinh4

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Answer 1

TRUNG TÂM DVVL BÌNH DƯƠNG 0

Thank you for your response. I understand that Microsoft Unified Support is a paid service. However, my issue affects a Microsoft 365 Developer Program subscription that was successfully renewed by Microsoft. Today I received the official renewal email confirming that my Microsoft 365 Developer E5 subscription has been renewed until October 20, 2026 (UTC). Despite the successful renewal: - My only Global Administrator account cannot sign in because MFA fails with Error 50089. - SharePoint Admin Center reports that my Developer tenant is limited to only 300 GB of pooled storage. Since these issues appeared after my active Developer subscription renewal, could you please advise whether they can be escalated to the Microsoft 365 Developer Program team for investigation? Thank you. hinh5

Hin-V 16,830 Reputation points Microsoft External Staff Moderator

2026-07-28T17:55:04.6866667+00:00

Hi

From your second screenshot, I can see that you still have access to an active SharePoint admin session. May I ask whether you are able to access the Microsoft 365 Admin Center and then navigate to the Microsoft Entra admin center?

If yes, you may try resetting or revoking the MFA methods associated with your admin account. Before proceeding, if you are not completely certain about the impact, I would strongly recommend creating another Global Administrator account first to ensure you retain administrative access to the tenant in case any issues arise during the process. Please give this a try and let me know the outcome.

Regarding the 300 GB pooled storage limit issue, I have recently seen several reports from other users experiencing similar behavior. However, I have not been able to find any official documentation, service health communication, or validated report that confirms the cause of this behavior. Given my limited visibility into backend systems, I am unable to verify whether this behavior is the result of an intended change or a service-related issue. Additionally, I do not have the ability to create or escalate support tickets on your behalf. For further investigation, I would recommend contacting the Microsoft 365 Developer Support team through Microsoft Unified Support, where they may have access to additional diagnostic information and resources to assist with your case.

Warm thanks.
TRUNG TÂM DVVL BÌNH DƯƠNG 0 Reputation points

2026-07-30T02:26:51.04+00:00

Thank you very much for your response and for your suggestions.

I would like to provide some additional information regarding my issues.

1. MFA / Global Administrator access

I can successfully access the SharePoint Admin Center, but I cannot access the Microsoft 365 Admin Center or the Microsoft Entra Admin Center.

Whenever I sign in with my Global Administrator account (******@tvgtvl.onmicrosoft.com), I am immediately redirected to SMS verification. Unfortunately, the SMS verification always fails because no verification code is sent to my registered phone number.

As a result, I cannot access the Admin Center to reset or revoke my MFA methods, and I am also unable to create another Global Administrator account as you suggested.

Is there any alternative recovery process available for Microsoft 365 Developer tenants in this situation?

2. SharePoint storage limit

My Microsoft 365 Developer subscription was successfully renewed, and the expiration date has been extended to October 20, 2026 (UTC). I also received the official renewal confirmation email from Microsoft.

However, SharePoint still reports "Site storage limit exceeded", while OneDrive shows 5 TB of available storage.

Could you please confirm whether this is a known issue affecting Microsoft 365 Developer tenants after renewal, or if there is any action required on my tenant?

I appreciate your assistance and look forward to your guidance. Thank you very much.
Hin-V 16,830 Reputation points Microsoft External Staff Moderator

2026-07-30T20:10:45.43+00:00

Hi, thank you for the additional information.

Regarding your MFA issue, since you are currently locked out of the only administrator account in your Microsoft 365 Developer E5 tenant, there are two official options available to regain access to the tenant:

1.Please visit the following page and reach out to phone number via: Customer service phone numbers - Microsoft Support

From what I know, you will need to get past the initial AI system to reach the live support team. You can refer to the guide below for tips on how to get through more easily:

(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.)

In some countries, it is an automated conversation like:

IVR: What kind of problem are you concerned about?

You: Authenticator.

IVR: What kind of product do you use?

You: Microsoft 365 for business.

IVR confirmation: education or company account?

You: For companies

IVR: Are you an administrator?

You: Yes.

IVR: Do you have another administrator in your organization?

You: No.

IVR: Do you need a... Service request?

You: Yes. I need to create a ticket. Please send me directly to the Data Protection Team.

2.If Method 1 does not resolve the issue, you may consider registering a new tenant by signing up for a trial subscription using this link. This will allow you to create a new tenant by following the on-screen prompts.

Once the new tenant is set up, you can access the Microsoft 365 admin center and submit a support ticket requesting assistance from the Data Protection team regarding your previous tenant.

Assuming you have successfully created the trial tenant, navigate to the Microsoft 365 admin center and click the Help & support icon to raise a ticket. The support agent will be able to create a case under the affected tenant and subsequently transfer it to the Data Protection team, who can assist you in regaining access.

Please mention that you are raising ticket on behalf of the affected tenant that you do not have access to. The support team will help you to create ticket on the affected tenant then later on the Microsoft Data Protection team will assist you.

Note: This process will take more time than usual (7-14 working days) for your account to get access again as Data Protection is always overwhelmed with the number of tickets. As I am forum moderator, I do not have access to Microsoft internal system to assist or push this process to be quicker.

On the other hand, if you do create the trial and it resolves the issue, please remember to cancel the subscription afterward to avoid any related charges.

I understand that this entire process can feel long and complicated, and I truly appreciate your patience while working through it. These steps are in place to protect the security of your account, so I hope you can understand why they are required. I sincerely hope you’ll be able to regain access to your account soon. If you need help at any point, or if you have any questions during the process, please feel free to reach out, I’m always here and happy to assist.

Regarding the SharePoint storage limit, I completely understand that the current situation may be confusing, and at this time I do not have any additional updates or confirmation as to whether this is an issue on Microsoft's side.

For now, the only available path to obtain further clarification would be to contact Unified Support so that they can investigate the matter in more detail. In the meantime, I will continue monitoring related discussions and reports. If I come across any new information or receive any updates relevant to your case, I will let you know as soon as possible.

Once again, I appreciate your patience and understanding.
Best regards,

Answer 2

Thank you for your response. I understand that Microsoft Unified Support is a paid service. However, my issue affects a Microsoft 365 Developer Program subscription that was successfully renewed by Microsoft. Today I received the official renewal email confirming that my Microsoft 365 Developer E5 subscription has been renewed until October 20, 2026 (UTC). Despite the successful renewal: - My only Global Administrator account cannot sign in because MFA fails with Error 50089. - SharePoint Admin Center reports that my Developer tenant is limited to only 300 GB of pooled storage. Since these issues appeared after my active Developer subscription renewal, could you please advise whether they can be escalated to the Microsoft 365 Developer Program team for investigation? Thank you. hinh5

Answer 3

Please note that our forum is a public platform, and we will modify your question to hide your personal information in the description. Kindly ensure that you hide any personal or organizational information the next time you post an error or other details to protect personal data.

Hi, thank you for reaching out.

Please note that we're not Microsoft Support, this is a user-to-user community forum. Moderators here don't have access to your environment or Microsoft's backend systems, so we can only provide guidance based on public documentation and community experience.

For your concerns:

Regarding the MFA issue, as far as I know, the error Code 50089 can indicate that the authentication flow could not be completed successfully, which may occur if the sign-in session expires or if the configured MFA method cannot be validated properly.

May I know whether there are any other Global Administrator accounts in your tenant? If so, you may ask another administrator, or use another administrator account, to revoke your existing MFA sessions and review or reset your authentication methods. After that, you can try signing in again and re-register MFA on your device. This would help determine whether the issue is related to the current MFA registration associated with your account.

You can refer more via: Manage authentication methods for Microsoft Entra multifactor authentication - Microsoft Entra ID |…

Regarding the storage issue, based on the current Microsoft 365 Developer Program FAQ, Developer Program subscriptions have documented storage limits, including 300 GB of pooled SharePoint storage and 10 GB of OneDrive storage per user. These limits differ from the storage entitlements described for commercial Microsoft 365 E5 subscriptions.

Reference: Microsoft 365 Developer Program FAQ

Since your Developer Dashboard still shows an active Renewable E5 subscription with 84 days remaining, while SharePoint Admin Center is enforcing a 300 GB storage limit and placing sites into read-only mode, it is difficult to determine whether this behavior is expected for your tenant or whether an issue exists with the tenant's licensing or storage entitlement.

If your tenant previously operated with storage usage above 300 GB and only recently started enforcing this limit, this would require investigation by the Microsoft 365 Developer Program support team, as they have access to the backend licensing and tenant provisioning information that isn't available through the community forums.

You can create a support ticket online or contact Developer Support , which is available as an optional component of Microsoft Unified Support.

You can read more at Open a new Support request - Microsoft Engage Center | Microsoft Learn

Please note that this is a paid support ticket, which means it requires an active support plan or a one-time support purchase. However, the benefit of using this channel is that your inquiry will be routed directly to the Microsoft Product Group responsible for the specific service or feature in question. This team includes engineers and developers who work on the product itself, so they are best positioned to provide accurate, in-depth, and authoritative answers especially for complex or edge-case scenarios that go beyond publicly available documentation or community knowledge.

I hope this helps.

If you have any additional concerns, feel free to comment below. I would be more than happy to assist.

Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.

TRUNG TÂM DVVL BÌNH DƯƠNG 0 Reputation points

2026-07-28T10:08:09.68+00:00

Thank you for your response. I understand that Microsoft Unified Support is a paid service. However, my issue affects a Microsoft 365 Developer Program subscription that was successfully renewed by Microsoft. Today I received the official renewal email confirming that my Microsoft 365 Developer E5 subscription has been renewed until October 20, 2026 (UTC). Despite the successful renewal: - My only Global Administrator account cannot sign in because MFA fails with Error 50089. - SharePoint Admin Center reports that my Developer tenant is limited to only 300 GB of pooled storage. Since these issues appeared after my active Developer subscription renewal, could you please advise whether they can be escalated to the Microsoft 365 Developer Program team for investigation? Thank you.