To sign up for Challo:

  1. Visit
  2. Provide you email address in one of the following ways:
    • By email
      1. Enter your email address and click Sign Up.
      2. When you click Verify, in the email you receive, you are ready to start using Challo.
    • Or use one of the following external providers where appropriate:
      • Google
      • Microsoft

When you sign up, Challo creates a new tenancy and makes you a tenant’s administrator, unless you join an existing tenancy.

After you sign up, you setup additional providers to log in to Challo.

Login with Microsoft supports the following:

  • Azure AD work accounts
  • Azure AD personal accounts
  • Azure AD Connect
  • Windows Live

Important: If you are a system administrator for an enterprise, register your organization’s email domain with your Challo account manager. When someone signs up with a matching email domain, Challo adds them to your organization’s Challo account automatically.