Check ID:
Provider: Azure
Service:
Severity: MEDIUM
Categories:
Resource type:
storage_ensure_azure_services_are_trusted_to_access_is_enabledProvider: Azure
Service:
storageSeverity: MEDIUM
Categories:
trust-boundariesResource type:
microsoft.storage/storageaccountsWhat this check verifies
Azure Storage account network rules include theAzureServices bypass so trusted Microsoft services can reach the account even when firewalls restrict public access
Risk
Without this exception, platform services relying on the account (backup, monitoring, replication) can be blocked, causing failed backups, missing logs, and stalled workflows-affecting availability and integrity. Teams may over-broaden network access to compensate, increasing confidentiality risk.Recommendation
Enable the trusted services exception (AzureServices) for storage accounts used by platform services.
- Enforce least privilege with RBAC and managed identities
- Keep networks restricted; prefer private endpoints
- Monitor access and review exceptions regularly
Remediation
- CLI
- Terraform
- Native IaC
- Dashboard steps
az storage account update —name <StorageAccountName> —resource-group <resourceGroupName> —bypass AzureServices
References
- https://www.trendmicro.com/cloudoneconformity/knowledge-base/azure/StorageAccounts/enable-trusted-microsoft-services.html
- https://support.icompaas.com/support/solutions/articles/62000219788-ensure-allow-azure-services-on-the-trusted-services-list-to-access-this-storage-account-is-enabled-
- https://learn.microsoft.com/en-us/azure/search/search-indexer-howto-access-trusted-service-exception
Where this check fires
This check runs on every scheduled scan against your Azure account. Findings appear at Cloud Security → Findings filterable byCheck ID = storage_ensure_azure_services_are_trusted_to_access_is_enabled. To re-evaluate after a fix, hit Run now on the account’s schedule under Cloud Security → Schedules — the next scan re-checks this control and marks the finding fixed or keeps it persistent.
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