I have already generated the CSR and stored it in Keychain; now I simply need it signed through an active Apple Developer account so I can finish configuring my Apple Business Manager MDM server. Your task is straightforward: use your valid Developer ID to upload the CSR on the Apple Push Certificates Portal, download the signed certificate, and send it back to me along with any intermediate files needed to import it into my server. If verification on my side shows the certificate loads and the push channel activates, the job is done. Let me know the estimated turnaround time and any format preferences you might have for exchanging the files.