A free program from Microsoft that provides developers with the tools, resources, and sandbox environments needed to build solutions for Microsoft 365.
Please understand that our forum is a public platform, and we will modify your question to cover the personal information in the description. Kindly ensure that you hide these personal or organization information next time you post error or some information to protect personal data.
Dear @Karl Wickham,
Welcome to Microsoft Q&A Forum!
Based on your description, I have tried my best to research and find this information that may be related to your situation (you can check the Q&A Assist as well):
Please note that even after deleting the old profile, there is typically a 60‑day waiting period before the original phone number becomes fully available for a new subscription. This is part of the program’s policy to prevent abuse.
As Microsoft Q&A Forum moderators, we don’t have the permissions to reset or modify Developer Program profiles on behalf of users. If you’ve confirmed that your phone number meets the 60‑day waiting‑period requirement for the Microsoft 365 Developer Program, but you still encounter the same error, you’ll need to contact Microsoft Support for further assistance. Only they can help you in this case.
You can refer to the official article for more details: Microsoft 365 Developer Program FAQ | Microsoft Learn
Here is the site for Microsoft Support with this program: Services Hub. Please note that Services Hub is intended for paid support tickets and access is subject to certain conditions. You can find more details here: Services Hub sign in FAQs | Microsoft Learn
Besides that, if you believe that you can qualify for the program based on the conditions in FAQ link, here is the official link to register for the Microsoft 365 Developer Program and request an E5 Developer subscription, please follow this link: Welcome to the Microsoft 365 Developer Program | Microsoft Learn
Please note that it does not have permanently free using, you have to qualify again for renewing.
I hope this information can give you more insights in this situation and please kindly check and follow the official information of this program.
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