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Phone number already used in Microsoft 365 Developer Program without tenant creation

Nico 0 Reputation points
2026-04-28T08:36:14.5866667+00:00

Hello,

I previously signed up for the Microsoft 365 Developer Program and verified my phone number.

However, no tenant or sandbox was ever created.

Now I want to register properly with a different Microsoft account (.com), but the phone number is blocked as already used.

Since no tenant was ever provisioned, I would like to ask if the phone number can be released or unlinked from the old developer profile.

Thank you.

Microsoft 365 and Office | Development | Microsoft 365 Developer Program
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  1. Gabriel-N 18,875 Reputation points Microsoft External Staff Moderator
    2026-04-28T09:23:48.5633333+00:00

    Hello Nico

    Please note that, as a forum moderator, I do not have access to the internal systems required to investigate individual account‑related issues due to privacy and security controls. In addition, the qualification and renewal process for Microsoft 365 Developer Program tenants is fully automated and driven by predefined eligibility criteria and telemetry. For this reason, I’m unable to manually reset or override Developer Program eligibility.

    At this point, the guidance provided by the AI response already aligns closely with my understanding. To summarize, you’ll need to sign in to the old account that previously used this phone number and delete that account. Since this phone number is not currently associated with any active developer sandbox, it may be eligible for reuse to sign up for the Developer Program again after some time. However, this release process can take up to 60 days in normal cases.

    If you need a developer account as soon as possible, based on experience, the quickest option is to use another phone number to sign up.

    I also recommend reviewing the Microsoft 365 Developer Program FAQ, particularly the following sections, which provide more detailed eligibility information:

    I hope this clarifies the situation, and thank you for your understanding.

    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.

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  2. AI answer

    2026-04-28T08:36:33.2666667+00:00

    A phone number can be associated with only one Microsoft 365 Developer Program account. To reuse that phone number with a different Microsoft account, the existing Developer Program profile that currently uses the number must be deleted.

    Steps to free the phone number:

    1. Sign in with the Microsoft account that was originally used to join the Microsoft 365 Developer Program.
    2. Go to the Developer Program dashboard: https://developer.microsoft.com/microsoft-365/profile
    3. Choose Delete Profile to delete the existing Microsoft 365 Developer Program account that is holding the phone number.
    4. After deletion, sign up again for the Developer Program with the new Microsoft account and register the same phone number.

    Notes:

    • Only one Developer Program account can be associated with a phone number at a time.
    • If the existing Developer Program account has (or had) a subscription, it must have been active for more than 60 days before a new subscription can be obtained after deletion.

    If access to the old Developer Program profile is not possible (for example, the original account cannot be signed in), support assistance is required to work with Microsoft to recover or remove that profile before the phone number can be reused.

    References:

    AI-generated content may be incorrect. Read our transparency notes for more information.

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