After creating the application instance for your CSP partner account, you need to give your consent to the permissions that the Office 365 application requires, and then acquire a refresh token. This refresh token will be securely stored and used by the Office 365 application to make calls to the Partner Center and Graph APIs on behalf of your CSP partner account. To give your consent and acquire this refresh token, use the instructions provided at https://kb.cloudblue.com/en/133595.
Warning: A refresh token has a limited lifetime of 90 days. You must acquire a new refresh token before the current refresh token expires.