Provide a name to reference the new app registration e.g. valtixcontroller
In the Supported account types choose the 2nd option Accounts in any organizational directory. (Choose the option appropriate to your organization)
The Redirect URI is not needed for the creation of the App registration. Click Register
In the left navigation bar under the newly created application, click Certificates & secrets
Click + New client secret, and then enter the required information in the Add a client secret dialog
Description - Add a description (e.g valtix-controller-secret1)
Expires - Choose Never (or any time as appropriate. You will need to create new secrets when the current one expires)
Click Add. The Client secret is populated under the Value column
Copy the Client secret into a notepad, as this is shown only once and is never displayed again
In the left navigation bar click Overview (this is the application overview), copy the Application (client) ID and Directory (tenant) ID into a notepad