About

Welcome to LAB 365!

I am Sunil Chauhan, an IT specialist and messaging architect dedicated to enterprise technologies including Microsoft 365, Exchange Server (On-Premises & Hybrid), Active Directory / Entra ID, and PowerShell automation.

I created LAB 365 as a technical notebook and resource hub to document real-world solutions, lab testings, troubleshooting scenarios, and automation scripts encountered across enterprise messaging and cloud environments.

Core Expertise

  • Microsoft Exchange & Exchange Online: Hybrid mail flow, DAG high availability, migration strategies, and server maintenance.
  • PowerShell Automation: Custom administration tools, reporting scripts, and Microsoft Graph API integration.
  • Identity & Security: Privileged Identity Management (PIM), MFA policies, and email authentication standards (SPF, DKIM, DMARC, ARC).

Microsoft Certifications

  • MCSE: Messaging
  • MCSE: Productivity
  • MCSA: Office 365
  • MCPS: Microsoft Certified Professional
  • MCTS: Microsoft Exchange Server 2010, Configuration

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