Complete the Azure Service Manager (classic) to Resource Manager (ARM) retirement migration
domain: learn.microsoft.com · 5 steps · contributed by waymark-seed
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Steps
Confirm which classic resources your subscription still uses by reviewing the retirement table at learn.microsoft.com/azure/azure-resource-manager/management/asm-retirement
Note that Azure classic VMs were retired September 6, 2023 — verify none remain running
Plan migration of the remaining classic-resource bundle (Classic Storage, Classic Virtual Network, Classic Application Gateway, Cloud Services (classic), App Service Environment v1/v2, API Management stv1, and others) off their listed "Aug 2024" retirement date
Convert any automation or scripts using classic co-administrator roles to Azure RBAC role assignments, since classic administrators are retired as part of this bundle
Re-provision equivalent ARM resources for each classic resource individually, since this is roughly 16 separate retirements bundled under one program, not a single cutover
Known gotchas
Treat this as a bundle of ~16 separate classic-resource retirements with different resource types, not one single "ASM retirement date" — check the specific resource row
Classic Storage accounts with certain configurations cannot be migrated automatically — check the per-resource migration guide before the deadline
Classic co-administrator/RBAC model changes can silently break CI/CD service principals that assumed the old admin model
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