A free program from Microsoft that provides developers with the tools, resources, and sandbox environments needed to build solutions for Microsoft 365.
*Please note that Q&A forum is a public platform, and moderators will modify the question to hide 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.*Hello Chikadibia EzehPlease access your Developer Dashboard at https://developer.microsoft.com/en-us/microsoft-365/profile and double‑check the admin account displayed on that page. From there, you can right‑click to open your E5 sandbox and select Copy link. Next, open a new InPrivate browsing session by pressing Ctrl + Shift + N, then paste the copied link into the address bar.
Please take note of the account shown after the login hint, as this should be the admin account of your E5 Developer tenant. After that, press Enter. If the account has been identified correctly, you should see the prompt to enter your password.
If you are still unable to sign in after following these steps, the only available way to regain access would be to contact Microsoft Support. Consider contacting Microsoft Support via phone or creating a new trial tenant and submitting a support request on behalf of the locked tenant. Please refer to the following thread for detailed guidance: https://dori-uw-1.kuma-moon.com/en-us/answers/questions/5823773/urgent-locked-out-of-microsoft-365-developer-tenan
Please note that the trial subscription is valid for 30 days. Before it expires, remember to cancel the trial in the Microsoft 365 Admin Center to avoid any unexpected charges. You can follow this guide for instructions: Cancel your Microsoft business subscription in the Microsoft 365 admin center | Microsoft Learn.
I hope this information is helpful. Please feel free to share any updates.
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