Walk-in || Exchange and Active Directory Administrator

Designation: Exchange and Active Directory Administrator

Job Brief

The Exchange and Active Directory Administrator is responsible for designing, managing and securing the organizations messaging and identity infrastructure across on-premises Exchange Server, Exchange Online and Active Directory environments. The role focuses on maintaining the health, availability and performance of Exchange servers, Database Availability Groups (DAGs) and mail flow, while managing Active Directory domains, Group Policy, DNS and user and group lifecycles. The administrator will support hybrid identity and synchronization with Microsoft Entra ID, manage mailbox migrations and email security controls, monitor replication and service health, and drive patching, vulnerability remediation and compliance with organizational security standards.

Roles and Responsibilities

• Install, configure, upgrade and maintain Exchange Server 2016/2019 (and Exchange Server SE), including Database Availability Groups, load balancing and certificates.

• Administer Exchange Online and hybrid Exchange configurations, including mailbox migrations between on-premises and Microsoft 365.
• Manage mail flow, connectors, transport rules, accepted domains and message tracking; troubleshoot delivery and queue issues.
• Implement and manage email security controls, including anti-spam, anti-malware, SPF, DKIM, DMARC and Microsoft Defender for Office 365.
• Administer Active Directory domains, forests, sites and trusts; manage domain controllers, FSMO roles and AD replication.
• Manage users, groups, OUs, service accounts and delegated permissions across the account lifecycle.
• Design, deploy and troubleshoot Group Policy Objects; manage AD-integrated DNS and DHCP.
• Manage hybrid identity with Microsoft Entra Connect / Cloud Sync, including synchronization health and attribute issues.
• Perform AD and Exchange backup, recovery and DR testing, including AD Recycle Bin and authoritative restores.
• Monitor service health, replication and performance, and maintain capacity for mailbox databases and domain controllers.
• Coordinate patching, cumulative updates, security updates and vulnerability remediation across Exchange and AD servers.
• Implement identity and messaging security best practices and ensure compliance with organizational security standards.
• Automate administrative tasks and reporting with PowerShell (Exchange Management Shell, ActiveDirectory module).
• Maintain documentation, runbooks and SOPs, and handle escalated incidents and changes through ITIL processes.

Requirements

• Bachelor’s or master’s degree in Engineering, Computer Science, Information Technology or a related field.

• 4–6 years of hands-on experience in Exchange and Active Directory administration.
• Strong experience with Exchange Server 2016/2019, DAGs, mail flow and hybrid Exchange with Exchange Online.
• Strong experience with Active Directory, Group Policy, DNS, DHCP, AD replication and FSMO roles.
• Working knowledge of Microsoft Entra ID (Azure AD) and Entra Connect / Cloud Sync.
• Knowledge of email security standards and tools (SPF, DKIM, DMARC, Defender for Office 365) and certificate management.
• Experience with backup and recovery of AD and Exchange, and with patching and vulnerability remediation.
• Proficiency in PowerShell for administration and automation.
• Familiarity with ITIL processes and ticketing tools such as ServiceNow.
• Good written and verbal communication skills.
• Professional attitude with a customer-focused approach.
• Flexible to work in shifts and at different locations based on business requirements.