Our Azure reference focuses on ARM deployment failures, Entra ID authentication and authorization errors, and storage/runtime service exceptions. Each guide maps provider messages to actionable checks across tenant, subscription, resource group, and policy layers used in real operations.
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Microsoft Entra or Microsoft Graph returns group-not-found responses when the target group object cannot be resolved in the current tenant directory.
Microsoft Entra or Microsoft Graph returns `AADServicePrincipalNotFound` when the requested service principal object cannot be resolved in the active tenant.
Microsoft Entra ID returns `AADSTS700016` when the client application identifier cannot be found in the target tenant directory.
Microsoft Entra ID returns `AADSTS7000215` when an app sends an invalid client secret in token requests.
Microsoft Entra ID returns `AADSTS90002` when the tenant identifier in the auth request cannot be found or resolved.
Microsoft Entra or Microsoft Graph returns user-not-found responses when the referenced user object cannot be resolved in the active tenant.
Azure returns `AllocationFailed` when the target cluster or region cannot provide the requested VM size/capacity at deployment time.
Azure Resource Manager returns `AuthorizationFailed` when the authenticated principal lacks permission for the requested action at the target scope.
ARM returns `BadRequest` when deployment values or request structure do not match what Resource Manager expects.
Azure Blob service returns `BlobNotFound` (404) when the specified blob path does not exist in the addressed container.
Azure Storage returns `ConditionNotMet` when conditional headers fail; writes typically return HTTP 412 Precondition Failed.
ARM returns `Conflict` when the requested operation is not allowed for the resource in its current state.
Azure Blob service returns `ContainerNotFound` (404) when the specified blob container does not exist.
ARM returns `DeploymentFailed` as a wrapper error when one or more inner deployment operations fail.
Azure returns `Forbidden` (403) when the caller is authenticated but blocked by authorization, policy, or service-level access controls.