Microsoft 365/Messaging & Exchange Administrator
First seen by Alion on Sep 17, 2026.
Role Overview :
We are looking for experienced Microsoft 365 / Messaging & Exchange Administrators to provide L2/L3 support and manage enterprise messaging environments across Microsoft 365, Exchange Online, Exchange On-Premises, and Hybrid Exchange environments.
Key Responsibilities :
- Provide L2/L3 support for Microsoft 365, Exchange Online, Exchange On-Premises, and Exchange Hybrid environments.
- Manage mailboxes, distribution groups, shared mailboxes, resource mailboxes, and collaboration services.
- Perform mailbox provisioning, migrations, decommissioning, public folder management, and directory integrations.
- Support Exchange, Teams, SharePoint, email, calendaring, and messaging-related applications.
- Monitor messaging infrastructure health, performance, and availability.
- Manage incidents, service requests, problem tickets, and escalations using ITSM tools.
- Perform proactive troubleshooting, root cause analysis, service restoration, capacity planning, and performance tuning.
- Support Disaster Recovery (DR) and failover processes.
- Build and configure Exchange environments; experience in Exchange environment deployment is an added advantage.
- Manage administrative settings for Exchange On-Premises, Exchange Online, ADFS, Directory Synchronization, DAG, Load Balancing, and FIM.
- Manage end-to-end Exchange infrastructure and maintain infrastructure hygiene.
- Ensure compliance with corporate security policies, SOX controls, audit requirements, and access governance standards.
- Manage role-based access controls, privileged account reviews, and audit reporting.
- Support email security, encryption, authentication, spam protection, and secure mail flow using TLS.
- Install, maintain, upgrade, and support messaging infrastructure and software.
- Execute messaging platform changes, testing, deployments, and lifecycle management activities.
- Support mail routing, SMTP gateways, spam filtering, and messaging integrations.
- Maintain technical documentation, SOPs, runbooks, and knowledge base articles.
- Manage Microsoft support cases and coordinate with vendors for issue resolution.
- Support and administer Venafi, One Identity, PartnerNet, Poppulo, and ManageEngine.
- Track vendor roadmaps and implement required platform enhancements.
- Support mailbox-level recovery, retention, archival, compliance searches, and audit requests.
- Coordinate with backup teams for backup schedules and restoration activities.
- Participate in DR and Business Continuity (BCP) testing.
Required Technical Skills :
- Microsoft 365 Administration / O365, Exchange Online, Exchange Hybrid, Exchange Server / Exchange On-Premises
- Microsoft Teams, SharePoint Online, Microsoft Entra ID / Azure AD, Active Directory / Windows Server
- PowerShell Scripting, SMTP / DNS, SPF / DKIM / DMARC, Email Security & Compliance
- TLS / Secure Mail Routing, Exchange DAG, ADFS / Directory Synchronization, Load Balancing
- Disaster Recovery & Failover, ServiceNow / ITSM Tools
Skills
Office 365, Exchange, Exchange Server, System Administration, Entra ID, Active Directory, Windows Server, SMTP, DNS, ITSM