# MDM - Invalid APNs Certificate

## Problem

You get an error message "Invalid APNs Certificate" while uploading APNs certificate.

## Cause

You might get this error message due to one of the following reasons:

- [Wrong APNs file format](https://www.manageengine.com/products/desktop-central/mdm-invalid-apns.html#wrongfileformat)
- [Incorrect APNs password](https://www.manageengine.com/products/desktop-central/mdm-invalid-apns.html#incorrectpassword) (Applicable only for versions lower than Endpoint Central Build 90072)
- [APNs certificate expired](https://www.manageengine.com/products/desktop-central/mdm-invalid-apns.html#apnsexpired) (Applicable only for versions lower than Endpoint Central Build 90072)

## Resolution

You need to verify if the following while uploading the APNS certificate and managing a mobile device using Endpoint Central MDM.

### Wrong APNs file format

While uploading APNs certificate, ensure that the uploaded file is in **.p12** format for earlier versions of Endpoint Central.

For Endpoint Central Build 90072 and above, ensure that the uploaded file is in **.pem** format.

### Incorrect APNs password

When you upload APNs certificate, ensure that you provide the same password that you have used to create the APNs certificate.

### APNs certificate Expired

Ensure that the APNs certificate is valid. If the APNs certificate has expired, re-generate a new APNs certificate and upload the same.

**Applies to:** Creating APNs certificate, Manage Mobile Device

**Keywords:** Incorrect APNs password, APNs certificate expired, APNs file format, Mobile Device Management.

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## Other KB articles

- [Agent Installation](https://www.manageengine.com/products/desktop-central/knowledge-base.html#agent-installation)
- [Configurations](https://www.manageengine.com/products/desktop-central/knowledge-base.html#windows-configurations)
- [Inventory Management](https://www.manageengine.com/products/desktop-central/knowledge-base.html#inventory-management)
- [Patch Management](https://www.manageengine.com/products/desktop-central/knowledge-base.html#patch-management)
- [Software Distribution](https://www.manageengine.com/products/desktop-central/knowledge-base.html#software-distribution)
- [Service Pack Installation](https://www.manageengine.com/products/desktop-central/knowledge-base.html#service-pack-installation)
- [Desktop Sharing](https://www.manageengine.com/products/desktop-central/knowledge-base.html#remote-desktop-sharing)
- [Active Directory Reports](https://www.manageengine.com/products/desktop-central/knowledge-base.html#active-directory-reports)
- [User Logon Reports](https://www.manageengine.com/products/desktop-central/knowledge-base.html#user-logon-reports)
- [Endpoint Central SP Upgrade](https://www.manageengine.com/products/desktop-central/knowledge-base.html#service-pack-upgrade)
- [Miscellaneous](https://www.manageengine.com/products/desktop-central/knowledge-base.html#miscellaneous)
- [» More](https://www.manageengine.com/products/desktop-central/knowledge-base.html)

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[Mobile Device Management - Knowledge Base](https://www.manageengine.com/products/desktop-central/knowledge-base.html#mobile-device-management)