Create application Link
Go to Administration -> Application links and click on Create Link
Create an External application link with Incoming Direction
Configure it as follows
Name: choose any name
Redirect URL: https://<your-jira>/plugins/servlet/senora/redirect
Permission: Write
Save
Configure Connection
Open Manage Apps tab
Open Configure Connection under the SHAREPOINT CONNECTOR FOR JIRA section
Open the Application link configured in the guide above by clicking on the three dots menu and then View Credentials
Copy and paste from the Application Link credentials both the Client ID and Secret in the relative sections
Save