Job Description:

Job Title: L3 – Mail & Messaging Support Administrator

Location: Mumbai
Department: Information Technology
Experience: 8–10 Years
Qualification: B.E./B.Tech in Computer Science/IT or MCA

Job Overview

We are seeking an experienced L3 Mail & Messaging Support Administrator responsible for the administration, support and troubleshooting of Microsoft 365, Exchange Online/Hybrid, Enterprise Email, Identity Management and Endpoint Management.

The candidate will own complex technical issues, manage critical incidents, perform Root Cause Analysis (RCA), ensure service health, develop automation scripts and coordinate with Microsoft Support and technology vendors.

Key Responsibilities

1. Microsoft 365 Administration

- Provide L3 support and administration for Exchange Online/Hybrid, Microsoft Teams, SharePoint Online, OneDrive and Microsoft Entra ID.
- Troubleshoot complex production and service-related issues.

2. Exchange & Email Security

- Manage mail flow, SMTP relay, mailboxes, permissions, NDRs, message tracing and email routing.
- Monitor and troubleshoot SPF, DKIM and DMARC configurations.
- Support enterprise email security requirements.

3. Identity & Access Management

- Administer Microsoft Entra ID/Azure AD, Active Directory, users, groups and roles.
- Troubleshoot authentication, authorization and Entra Connect synchronization issues.
- Support MFA and Conditional Access policies.

4. Teams, SharePoint & OneDrive

- Troubleshoot access, permissions, connectivity and synchronization issues.
- Manage collaboration-related policies and configurations.

5. Intune & Endpoint Management





- Support endpoint enrollment, device compliance, policies and application deployment.
- Troubleshoot integration between Intune, Entra ID and Microsoft 365.

6. L3 Incident, Problem & RCA Management

- Own complex L3 incidents and ensure resolution within agreed SLAs.
- Perform technical investigations and Root Cause Analysis.
- Maintain incident and problem management documentation.

7. PowerShell, Monitoring & Automation

- Develop and maintain PowerShell scripts for Microsoft 365 administration and automation.
- Monitor Microsoft 365 service health, alerts and advisories.
- Proactively identify service-impacting issues.

8. Vendor Management & Documentation

- Coordinate with Microsoft Support and technology vendors.
- Manage technical support cases.
- Maintain SOPs, runbooks and technical documentation.
- Support audits, security reviews and compliance requirements.

Essential Skills & Experience

- 8–10 years of experience in Microsoft 365, Exchange, Messaging or Enterprise Infrastructure Support.
- Hands-on L3 production support experience.
- Robust expertise in Exchange Online/Hybrid.
- Mail Flow, SMTP Relay, Message Tracing and NDR Troubleshooting.
- SPF, DKIM and DMARC.
- Microsoft Entra ID/Azure AD and Active Directory.
- Entra Connect / Azure AD Connect.
- MFA and Conditional Access.
- Microsoft Teams, SharePoint Online and OneDrive.
- Microsoft Intune and Endpoint Management.
- PowerShell Scripting and Automation.
- L3 Incident Management, Troubleshooting and RCA.
- Vendor Coordination and SLA Management.

Education

B.E./B.Tech (Computer Science/Information Technology) or MCA.

📌 – Mail & Messaging Support Administrator - Mumbai
🏢 AimsHR Consulting
📍 Mumbai