2025-11-03

Migrate Azure File Sync to Managed Identity

Azure File Sync still “works” for many orgs—but on 2010s-era auth: local X.509 certs and SAS tokens. Those are possession-based secrets: whoever holds them is “you.” They sprawl into scripts, backups, repos, and logs; they expire silently; and one leak grants silent exfiltration via valid creds. That isn’t identity—it’s superstition. The modern fix is Managed Identity (MI). Each Storage Sync Service and registered server authenticates through Entra ID with short-lived tokens; no static keys, no cert renewals, no whitelisting of cert endpoints. RBAC replaces secret distribution; revocation is instant; every call is auditable. Migration is housekeeping, not heart surgery: update the File Sync agent, enable system-assigned MI on Azure VMs (or Azure Arc + MI for on-prem/other-cloud servers), flip the Storage Sync Service to MI, and let Azure apply least-privilege roles to the storage account

Apple Podcasts · Spotify · YouTube · YouTube Music

Migrate Azure File Sync to Managed Identity (English)