A free program from Microsoft that provides developers with the tools, resources, and sandbox environments needed to build solutions for Microsoft 365.
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Thank you for reaching out to the Microsoft Q&A Forum and for providing such a detailed description of your scenario.
First, please note that this is a user-to-user support forum. Moderators, contributors, and external Microsoft employees participating here do not have access to Microsoft internal systems or the Microsoft 365 Developer Program backend. I’m therefore unable to check synchronization status or make any changes on the backend. My support here is limited to sharing general guidance based on available documentation and similar cases reported by other users.
At the moment, I haven’t been able to find any official documentation confirming whether any additional steps are required after updating or correcting name information in a Microsoft Account profile, including cases where special characters were previously used, and there’s no publicly available information that explains this behavior in detail.
However, I did come across a similar thread where another user experienced the same “missing first and last name” error during enrollment. In that case, the issue resolved on its own after some time without additional changes.
Sign in for office 365 developer program fails - Microsoft Q&A
Given that, you may consider allowing some additional time and trying again later. If the issue continues, you might also consider trying to enroll using a different Microsoft account to see if you’re able to complete the registration that way.
Thank you again for your patience and for sharing the detailed troubleshooting steps you’ve already taken.
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