How to connect to my new develeoper account

Hi,

I tried all options - VPN, inPrivate window, another ISP ...

Tenant was created yeasterday afternoon like Developer Sandbox

Hi @NAVRÁTIL Martin ,

Since zc47q41k8y.onmicrosoft.com is a newly created Microsoft 365 Developer tenant and you have never signed in successfully before, the issue may be occurring during the initial security registration process.

Please try the following first:

• Wait a few hours and try signing in again, as new Developer Program tenants can require additional time for provisioning.
• Use an InPrivate/Incognito browser session and sign in directly at https://entra.microsoft.com.
• Try a different browser or network connection (for example, mobile hotspot).
• Try signing on a different device to test the behavior.
• Disconnect the VPN, close the affected browser/app, reopen it, and sign in again.
• Connect to the approved corporate VPN, reopen the browser/app, and retry.
• Select "More details" on the error page and provide the Error code/Error message you receive.

As this is a public forum, please remove any personal information before uploading your images.

Could you also confirm whether this tenant was created through the Microsoft 365 Developer Program sandbox or through a standard Microsoft 365/Azure subscription? Additionally, did you receive a confirmation email from Microsoft indicating that the tenant was created successfully? That information will help determine the appropriate troubleshooting path.
Looking forward to your response so we can get this sorted out for you together.