Why Your Arc Deployment Becomes an Attack Surface (And How to Prevent It)

The security risk nobody talks about.

Deploy Azure Arc and every server becomes manageable from Azure. Sounds great. But Arc agents run in full mode by default – accepting any extension, executing any command.

Most organizations approach Arc as an agent deployment project. Install the agents, see servers in Azure portal, mission accomplished.

They miss the fundamental shift: These aren’t just monitored servers anymore. They’re Azure objects requiring the same architectural thinking as any Azure infrastructure. Skip the architecture planning, and you’ll rebuild everything when security audits fail.

Without proper architecture – asset classification, security boundaries, PIM integration, admin segmentation – you’ve connected every server to a management plane designed without security in mind.

The smart approach? Architect it right from day one. This training shows you how.

Yes, Arc Enables Great Things (With Proper Architecture)

• Update Manager at Scale
  • Patch thousands of servers from one place – if your architecture supports it.
• Defender for Servers Everywhere
  • Enterprise security across all environments – when designed correctly.
• Sentinel SIEM Integration
  • Unified security signals – with the right data architecture.
• Unified Monitoring
  • Single pane of glass – built on solid foundations.
• Defender for SQL
  • Database security across hybrid SQL estates – when discovery works correctly.
• Inventory and Change Tracking
  • Know what changed, when, and by whom – if data collection is properly configured.
• Custom Monitoring Solutions
  • Build workbooks and dashboards that answer YOUR questions – not Microsoft’s defaults.

But here’s what Microsoft doesn’t emphasize: Arc agents in full mode accept any extension and execute any command. Without architecting security boundaries, PIM integration, and proper admin segmentation FROM THE START, you’ve created a management plane that bypasses all your traditional server security.

THIS training shows how to architect Arc correctly from day one. Building the foundation properly so Update Manager, Defender, and Sentinel work securely at scale. Not patching security holes later.

Topics Covered

• Introduction to Azure Arc for Servers
  • Why Arc is an architecture decision, not an agent deployment. Understanding the transformation from servers to Azure objects and what that means for your entire management approach.
• Agent Deployment
  • Deploy Arc agents with the right architecture from the start. Configuration modes based on server roles, deployment patterns that scale, and the foundation work that must happen before the first agent installs.
• Architecture and Design Principles
  • Design Arc deployment with security built in from day one. Resource hierarchy, management group structure, and subscription topology that enables proper segmentation. Architecture decisions that determine success or failure.
• Azure Monitoring Agent (AMA) Data Collection Rules and Endpoints
  • Configure data collection that feeds your monitoring and security tools. Rules that collect what matters without drowning in noise.
• Azure Policy Implementation
  • Build policy architecture that enforces standards from day one. Not just individual policies – the framework that ensures consistency, security, and compliance across all Arc-enabled servers.
• Extension Management
  • Deploy and manage extensions at scale. Planning extension deployment, monitoring their status, and troubleshooting when things go wrong.
• Automation Techniques
  • Use Azure Automation with Arc-enabled servers. Runbooks, hybrid workers, and automation patterns that actually save time.
• Utilizing Workbooks
  • Create workbooks that answer real questions. Monitoring views, security dashboards, and reports people actually read.

The Architecture Microsoft Doesn’t Document

This training covers Arc architecture patterns that prevent security disasters:

• Foundation design that supports enterprise scale from day one
• Asset classification strategies built into your resource hierarchy
• Security boundaries that separate environments before deployment
• PIM and Conditional Access integrated from the start, not bolted on later
• Extension control architecture that prevents unauthorized deployments
• Monitoring vs management modes based on server criticality

Get the architecture right initially, or spend months fixing security issues later.

Pricing

• Fee: 450.- euros per person.
• Billing: An invoice will be sent to you following the completion of your registration.

Date & Time & Location

Europe Session

• Time: 09:00 – 17:00 CET (Central European Time)
• Date: October 29, 2025
• Location: Microsoft Teams

United States Session

• Time: 09:00 AM – 05:00 PM Pacific Time (PT) / 12:00 PM – 08:00 PM Eastern Time (ET)
• Date: October 30, 2025
• Location: Microsoft Teams

Meet Your Trainer: Kaido Järvemets

Microsoft MVP for 15 years. Currently recognized for Azure Security and Hybrid Solutions. Previously awarded for Configuration Manager, Enterprise Mobility, and Azure.

Here’s what I consistently observe: Organizations treat Arc as an agent deployment project. Install agents, done.

They miss the critical point – Arc transforms servers into real Azure objects. This requires proper architecture from day one: resource organization, security boundaries, access controls designed before the first agent deploys.

This training focuses on Arc as an architecture project, not just agent deployment. Because the decisions you make on day one determine whether you build a secure foundation or a security disaster.

• Read more about Kaido Järvemets

Terms and Conditions

1. Registration Confirmation
   • Upon registering for the training, a calendar invitation will be sent to your provided email address. It is important to accept this invitation within 24 hours of receipt to confirm and reserve your seat for the training. Failure to accept the invitation within this timeframe will result in the forfeiture of your reservation.
2. Training Fees
   • Please note that this is a paid training event. Details regarding the training fee are provided in the pricing section. An invoice for the training fee will be issued after your training confirmation.
3. Commitment to Participation
   • Last-minute cancellations and non-responsiveness after registration create challenges in managing the training effectively. We emphasize the importance of commitment once you have registered for the training. In case of any unforeseen circumstances that prevent you from attending, please inform us at the earliest convenience.
4. Invoice Information
   • Billing details and invoice information will be requested after your seat is confirmed. Prompt provision of these details is appreciated to ensure smooth processing.
5. Training Confirmation
   • Your participation is not confirmed until you have accepted the calendar invitation and received an official confirmation of your reservation from us.