In the on-premises environment, client registration depends on the identity provider.
Smart Completions Authentication identity provider
Client registration is not required when using the Smart Completions Authentication identity provider. The Smart Completions Authentication identity provider supports only the basic authentication grant type, which does not require client registration.
Azure AD identity provider
Client registration is required when using Azure AD as the identity provider.
For help, contact your Azure AD administrator or see the Azure AD documentation. Upon successful registration, your Azure AD administrator or Smart Completions administrator will have access to the authorization details needed authorize requests.
To keep your company and customer data safe, do not share the authorization details for your client with anyone! This information will allow anyone to access data, including data stored in other applications and shared with Smart Completions.