Intune APNs Certificate Expired: A Read-First Renew-vs-Replace and Enrollment-Error Triage

Intune administrators face specific challenges with APNs certificates and Microsoft 365 Apps installations. Expired APNs certificates cause new iPhone enrollment failures and prevent configuration profile updates on iPads, requiring careful renewal to avoid tenant-wide disruptions. Simultaneously, Microsoft 365 Apps may remain in pending or failed states due to Office CSP and Office Deployment Tool issues. These installations rely on the Office CDN rather than Win32 paths, necessitating targeted triage before rebuilding application suites.