If you haven't enabled E-Mail Notifications for your administrative account, this information is present in the Log section of your Silverback Management Console, too. Just click the Log button next to your account name on the top right and navigate to the Device Enrollment Program section and locate e.g., the following entry: The OAuth authentication returned 403 - Forbidden.
E-Mail Notifications for Token Alerts will be sent when the issue appeared for the first time and additionally every night. As the content of the E-Mail Notification is reflecting the original received error messages and codes from Apple it might be difficult to interpret them correctly. To adress this situation, this guide will highlight the most recent example notifications and what you need to do to solve the displayed error to avoid any service interruptions.
This is in most cases when Apple rejects your current Device Enrollment Program, which you need to update.
Please review the following articles for further information
This is in most cases when Apple updates the Software License Agreement, which must be confirmed by you or your Apple Business or Apple School administrator. Usually, your Apple Business or Apple School administrator will receive a notification from Apple in advance. If they missed the announcement and have not yet accepted the terms, an Apple Business or Apple School administrator must log in to Apple Business Manager or Apple School Manager and accept the new terms and conditions.
Please review the following Apple articles for further information: