Using Azure Oauth in HostBill for sending emails

Create Azure Application

In the Azure portal, select Azure Active Directory and go to App registrations.

Then click New registration.

Set a Name and select Supported account types. In Redirect URI, select Web and set Redirect URL from HostBill. Press Register.

For the created application go to Certificates & secrets and then press New client secret. Copy Client ID and Client Secret to HostBill.

Go to API permissions and Add a permission.

Add the following Scopes:

  • openid
  • email
  • offline_access

Go to Expose an API and Add a scope and Add a client application.

Set up Azure in HostBill

After creating Credentials, Client ID and Client Secret will be returned. These values must be set in HostBill in Mail Settings or in Additional mail senders.


  • SMTP Email address
  • SMTP Hostname
  • Port
  • Authentication to OAuth2
  • Provider to Azure

Then save the changes and press Connect. After successful Authorization, the Connection Token should be set.

SMTP Hostname should contain ssl:// or tls://

If messaging does not work after receiving an Access Token, make sure you have SmtpClientAuthentication enabled for Tenant. Visit for more information.

Error: Application is not configured as a multi-tenant application

Usage of the /common endpoint is not supported for such applications created after '10/15/2018'. Use a tenant-specific endpoint or configure the application to be multi-tenant.

Go to Azure Portal → Azure Active DirectoryApp registrations (preview) → Your AppAuthenticationSupported account types, and select Accounts in any organizational directory.