# APNs Certificate Expired or Revoked

Last updated: July 24, 2026

## Problem

The error "APNS certificate Expired/Revoked" occurs on the server when the APNs (Apple Push Notification service) certificate used by the MDM (Mobile Device Management) Server has expired or been revoked.

## Cause

- **Expired APNs Certificate:** APNs certificates have a limited validity period. If not renewed before expiration, they become invalid.
- **Revoked APNs Certificate:** The certificate may have been revoked due to security concerns or administrative actions.

## Resolution

To resolve the "APNS certificate Expired/Revoked" issue, follow these steps:

1. **Renew APNs Certificate:**
   - Generate a new APNs certificate. Visit [Renew APNs Certificate](https://www.manageengine.com/mobile-device-management/help/enrollment/mdm_renew_apns_certificate.html) for more details.
   - Ensure that the renewed certificate is uploaded and configured correctly on the MDM server.
2. **Update MDM Server Settings:**
   - After renewing the APNs certificate, update the MDM server settings to use the new certificate.
   - Verify that the updated certificate details are correctly configured in the MDM server administration panel.
3. **Re-enroll Devices:**
   - Devices that were previously enrolled and affected by the expired or revoked APNs certificate may need to re-enroll after the certificate renewal.
   - Communicate the re-enrollment process to users and guide them through the steps required to re-connect their devices to the MDM server.

If the problem still persists, contact **mdm-support@manageengine.com** (MDM On-Premises) or **mdmcloud-support@manageengine.com** (MDM Cloud).