# Azure Signup 404 Error Due to Pi-hole



{{< photocaption src="azure-signup-error-404.png" alt="Azure 404 error on signup" width="80%" >}}404 Error on Azure Signup pages{{< /photocaption >}}


Today I learned that if you're trying to sign up or log in to Azure and the captcha verification page throws a 404, it might be your Pi-hole blocking the domains Azure uses for human verification.

Temporarily disabling Pi-hole (or whitelisting the relevant domains) fixed it for me.