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Follow the instructions below to generate the MDM Apple Push Notification Service (APNS) certificate:

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1. Create a Certificate Signing Request (CSR) file (e.g.,  customer.csr)  from the MDM server using your private key. Keep your private key and CSR file in a safe location for further reference.

   Code Block
   openssl genrsa -des3 -out customerPrivateKey.pem 2048 openssl req -new -key customerPrivateKey.pem -out customer.csr

   Note
   If the required information is not provided the CSRs will be rejected in the signing process.

   After the above command is executed, y ou will be prompted to enter some information. Make sure to fill all the fields that will be incorporated into the CSR with your organization’s official details. The compulsory fields have been described as follows:

   Filed	Usage/Purpose
   Organization Name	Identifies what organization the CSR belongs to.
   Email	When a certificate expires, the customers will have to renew their certificate. In such situations, the email will be used to identify the existing customers.
   Common name	Fully qualified domain name of your server.

   The following is a screenshot of a sample CSR file generation process in Linux:

   Image Modified

2. Submit the CSR file to WSO2 via our site in order to obtain the signed CSR file in .plist format.
3. Go to the Apple Push Certificate Portal at https://identity.apple.com/pushcert/ and login with your customer account details.
   You do not need to have an enterprise account for this purpose.
4. Upload the the encoded .plist file and download the generated MDM signing certificate (MDM_Certificate.pem).
   The MDM signing certificate, is a certificate for 3rd party servers provided by Apple. 

5. Anchor
   MDM_APNS_TopicID MDM_APNS_TopicID

   Note down the USERID (TOPIC ID) from the MDM signing certificate (MDM_Certificate.pem) as it will be used later in the configuration. The MDM signing certificate can be decoded to obtain the USERID by executing the following command:
   openssl x509 -in MDM_Certificate.pem -text -noout
6. Remove the password from the your private key file (e.g.,  customerPrivateKey.pem).
   openssl rsa -in customerPrivateKey.pem -out customerKey.pem 
7. Merge the customer key file that was derived in the latter step, with the MDM signing certificate to generate the MDM Apple Push Notification Service (APNS) Certificate.
   For example, merge the customerKey.pem file with the MDM_Certificate.pem file to generate the MDM_APNSCert.pem file.
   cat MDM_Certificate.pem customerKey.pem > MDM_APNSCert.pem
8. Open the MDM Apple Push Notification service (APNs) Certificate (MDM_APNSCert.pem) and ensure that there is a line break between the contents of the two files.

9. Anchor
   pem_pfx pem_pfx

   Convert the MDM_APNSCert.pem file to the MDM_APNSCert.pfx file. You will need to provide a password when converting the file. Thereafter, follow the steps mentioned under iOS Settings.
   openssl pkcs12 -export -out MDM_APNSCert.pfx -inkey customerPrivateKey.pem -in MDM_APNSCert.pem