Microsoft 365 Messaging / Exchange Online Engineer

Required Technical / Functional Skills

• Strong hands-on experience in Microsoft Exchange Online administration and enterprise messaging support.
• Experience providing Tier 3/Tier 4 support, incident management, troubleshooting, and root-cause analysis.
• Expertise in mailbox administration, including user, shared, and resource mailboxes, permissions, delegation, and RBAC.
• Strong knowledge of mail-flow troubleshooting, connectors, transport rules, NDRs, message tracing, and email-header analysis.
• Experience troubleshooting Microsoft Outlook (Classic and New Outlook), including profiles, add-ins, shared mailboxes, and calendaring.
• Hands-on experience with email security solutions such as Proofpoint and Microsoft Defender for Office 365.
• Strong PowerShell scripting skills for Exchange Online administration, reporting, and automation.
• Experience with Microsoft 365 Apps administration, servicing, and Cloud Update.
• Knowledge of Microsoft 365 messaging security, access management, and operational best practices.

Preferred Skills

• Microsoft 365, Exchange Online, or related Microsoft certifications.
• Experience with Proofpoint Email Protection, URL Defense, quarantine management, and anti-phishing policies.
• Knowledge of Microsoft Defender for Office 365, Safe Links, and Safe Attachments.
• Understanding of Microsoft Purview, retention policies, eDiscovery, legal hold, and DLP.
• Knowledge of email authentication protocols: SPF, DKIM, and DMARC.
• Familiarity with Microsoft Entra ID, Microsoft Teams, and calendaring integrations.
• Experience with room mailboxes, conferencing, and AV/calendar integration.
• Experience with enterprise Microsoft 365 migrations and service improvements.
• Willingness to participate in on-call rotations and after-hours support.

Roles & Responsibilities

• Provide Tier 3/Tier 4 operational support for Exchange Online and Microsoft 365 messaging services.
• Troubleshoot complex email delivery, mailbox access, Outlook, and mail-flow issues.
• Manage mailbox provisioning, permissions, delegation, and access controls.
• Monitor messaging service health and resolve incidents within defined service levels.
• Administer and troubleshoot email security and hygiene solutions.
• Perform message tracing, log analysis, and root-cause investigations.
• Develop PowerShell scripts to automate administrative and operational activities.
• Support Microsoft 365 Apps servicing, updates, and deployment activities.
• Maintain technical documentation, operational procedures, and knowledge articles.
• Collaborate with security, identity, endpoint, and infrastructure teams.
• Support messaging migrations, service enhancements, and continuous improvement initiatives.