If you got the error message "Failed to obtain authorization from identity provider, please check the SAML configuration". This is because an invalid application secret was set. Invalid Application Secret may be caused by copying the incorrect value or it has expired.
Since the Client secret value cannot be viewed except immediately after creation. So follow the steps below to create a new one, and make sure to save the created secret before leaving the page.
1. Go to Azure portal > Azure Active Directory, and select App registrations.
2. Browse to All applications, and select the application that you added for the Foxit Admin console.
3. Select Certificates & secrets in the left sidebar, click New client secret, and enter a desired Description and Expires date.
4. Copy the value of the Client secret to the Application secret on the Foxit Admin console sync settings page.