How to Create the Application Client ID and Client Secret from Microsoft Azure New Portal?

Please see this article instead:

SSO Login via Azure Active Directory: https://www.bizmerlin.com/articles/azure-active-directory-bizmerlin-integration/

Also, you can find BizMerlinHR in the Azure Marketplace here:

https://azuremarketplace.microsoft.com/en/marketplace/apps/aad.bizmerlinhr?tab=Overview

Hope this helps.