In Microsoft Sentinel, data connectors are the mechanisms that collect logs and telemetry from various Azure and non-Azure sources into a Log Analytics workspace.

When your goal is to automatically connect multiple Azure subscriptions (both existing and new resources) to Sentinel, the correct approach is to use Azure Policy with connectors that rely on diagnostic settings.

Many Azure resources (e.g., Key Vaults, Storage Accounts, Azure Firewall, and Activity Logs) send logs to Sentinel via diagnostic settings. This connector type allows logs to be exported directly to the Sentinel workspace without requiring agents or manual configuration.

By using Azure Policy, you can automatically enforce and deploy these diagnostic settings across all current and future resources — ensuring continuous log ingestion with minimal administrative overhead.

When applying the Azure Policy, existing resources might not yet have diagnostic settings configured. To fix this, you create a remediation task. This instructs Azure Policy to apply the compliance settings to existing resources, not just new ones. Without a remediation task, only newly created resources would comply automatically.

Connector type: Diagnostic settings → used for policy-based deployment across subscriptions.

Use: A remediation task → ensures policy applies to both existing and new resources for full coverage.

✅ Final Answer:

Connector type: Diagnostic settings

Use: A remediation task