Hello,
Are you able to create a new Microsoft account using a different email address instead of your existing Gmail address? This will help determine whether the issue is with the account creation process or whether that specific Gmail address has been blocked.
This issue is usually related to the Wi-Fi network you’re connected to. For example, its IP address may have been temporarily restricted from creating new Microsoft accounts.
If you’re using a VPN, temporarily disable it, then try creating the Microsoft account again.
Based on your description, it appears you’ve already tried different Wi-Fi networks, web browsers, and devices with your existing Gmail address, but you're still being blocked from creating a new account. So,
- In this situation, open an InPrivate or Incognito window in any web browser and go to https://outlook.live.com/
- Alternatively, go directly to https://signup.live.com/
- Select “Create free account,” then enter your existing Gmail address.
You can also try using the Outlook or OneDrive app on your mobile device to create the Microsoft account instead of using a web browser.