Setting up or accessing Azure Active Directory require many IDs. Below is how to find them:
Tenant ID
Azure Portal > Azure AD > Domain names
Azure Portal > Azure AD > Properties > Directory ID
Instance
https://login.windows.net/
Client ID / Application ID / Audience
Azure Portal > Azure AD > App registrations > ApplicationId
Client Secret / Application Secret
Azure Portal > Azure AD > App registrations > choose the application > Keys
Keys are hidden and only visible the first time you add them.
Redirect URIs or Reply URLs
Azure Portal > Azure AD > App registrations > choose the application > Settings > Redirect URIs or Reply URLs
Resource
Azure Portal > Azure AD > App registrations
SQL database: https://database.windows.net/
References:
Azure AD