Exchange Server Customer Engineer

Sonata Software (SonataOne); Bengaluru; Hybrid; INR 4,000,000 - 6,000,000; Full time

Job summary

Sonata Software is seeking a highly experienced Exchange Server expert (L400) to design, deploy, migrate and optimize complex messaging environments for enterprise and government customers in a hybrid Exchange setup.

The role covers on-premises, hybrid and Exchange Online, including migrations across multiple versions, high availability via DAGs and secure, compliant messaging environments leveraging PowerShell and Microsoft Graph. Travel within the country is expected.

Qualifications

• 15+ years in customer-facing roles across systems architecture, administration and enterprise IT
• Proven track record delivering large Exchange migrations and hybrid deployments end to end
• BA/BS (or higher) in Information Technology or a related field, or equivalent experience
• Strong communication, presentation and interpersonal skills

Responsibilities

• Lead architecture, design, deployment and optimization of on-premises, hybrid and Exchange Online environments.
• Plan and execute upgrades and migrations across Exchange versions (2010, 2013, 2016, 2019 and Exchange Server Subscription Edition) and to Exchange Online.
• Configure and operate Exchange Hybrid, including the Hybrid Configuration Wizard, Modern/Classic Hybrid, free/busy, mail flow and coexistence.
• Design high availability and disaster recovery using DAGs, load balancing, namespaces and certificates.
• Resolve complex, critical-severity issues with root-cause analysis and clear remediation plans.
• Deliver health checks, risk assessments, workshops and knowledge transfer to customer teams.
• Secure messaging environments and advise on compliance, retention and Microsoft 365 governance.
• Automate administration and reporting with PowerShell and Microsoft Graph.
• Produce design documents, runbooks, migration plans and executive summaries.

Skills

Exchange Server

Hybrid deployments

Microsoft 365

PowerShell

Microsoft Graph

Education

BA/BS in IT or related field

Tools

Exchange Server

PowerShell

Microsoft Graph

Job description

JOB Title: CSA GD Exchange Server, Hybrid & Microsoft 365 Customer EngineerLevel 400

Job Description

Shifts Must be willing to work in shifts

Travel Must be willing to travel within the country Exp: 15 years

Role Overview

We are seeking a highly experienced, customer-facing Customer Engineer with expert-level (L400) skills across all versions of Exchange Server, Exchange Hybrid and Microsoft 365.

The candidate will design, deploy, migrate, optimize and troubleshoot complex messaging environments for enterprise and government customers, from legacy Exchange through to Exchange Online, and act as a trusted technical advisor to technical, non-technical and leadership stakeholders.

Key Responsibilities

• Lead architecture, design, deployment and optimization of on-premises, hybrid and Exchange Online environments.
• Plan and execute upgrades and migrations across Exchange versions (2010, 2013, 2016, 2019 and Exchange Server Subscription Edition) and to Exchange Online.
• Configure and operate Exchange Hybrid, including the Hybrid Configuration Wizard, Modern/Classic Hybrid, free/busy, mail flow and coexistence.
• Design high availability and disaster recovery using DAGs, load balancing, namespaces and certificates.
• Resolve complex, critical-severity issues with root-cause analysis and clear remediation plans.
• Deliver health checks, risk assessments, workshops and knowledge transfer to customer teams.
• Secure messaging environments and advise on compliance, retention and Microsoft 365 governance.
• Automate administration and reporting with PowerShell and Microsoft Graph.
• Produce design documents, runbooks, migration plans and executive summaries.

Required Technical Skills (L400)

Exchange Server (all versions)

• Deep knowledge of Exchange Server 2010, 2013, 2016, 2019 and Subscription Edition architecture, roles and services.
• Installation, cumulative/security updates, upgrades, side-by-side migrations and decommissioning (including removing the last Exchange server where supported).
• Database Availability Groups, transport (Edge/Mailbox), client access, namespace planning and certificate management.
• Performance tuning, capacity planning and advanced troubleshooting with logs, message tracking and diagnostic tools.

Exchange Hybrid

• Hybrid Configuration Wizard, Modern Hybrid Agent and Classic Hybrid deployments.
• Mailbox moves (remote move migrations), migration batches and endpoints; cutover, staged and IMAP migrations.
• Hybrid mail flow, connectors, centralized mail transport, OAuth, free/busy and organization relationships.
• Identity synchronization with Microsoft Entra Connect / Cloud Sync and Active Directory.

Microsoft 365 / Exchange Online

• Exchange Online administration: mailboxes, shared/resource mailboxes, permissions, policies, mail flow rules and connectors.
• Email security: Exchange Online Protection, Microsoft Defender for Office 365, SPF, DKIM and DMARC.
• Microsoft Purview: retention, litigation hold, eDiscovery, data loss prevention and auditing.
• Microsoft Entra ID: Conditional Access, MFA and modern authentication.
• Microsoft 365 tenant administration, service health, usage reporting and adoption.
• Cross-tenant mailbox migrations and tenant-to-tenant scenarios.

Relevant MIP / VBD Offerings

Experience and Qualifications

• 15+ years in customer-facing roles across systems architecture, administration, operations, IT consulting, and on-premises and cloud support for enterprise and/or government customers.
• Proven track record delivering large Exchange migrations and hybrid deployments end to end.
• BA/BS (or higher) in Information Technology or a related field, or equivalent experience.
• Strong communication, presentation and interpersonal skills.

Optional Skills

• Microsoft Graph API and Exchange Online PowerShell automation.
• Microsoft Teams and SharePoint Online integration with Exchange.
• Well-Architected Framework and Cloud Adoption Framework concepts.
• Microsoft 365 Certified: Messaging Administrator Associate, Microsoft 365 Certified: Administrator Expert, or Microsoft 365 Certified: Enterprise Administrator Expert (MS-102) are a plus

A BOUT SONATA SOFTWARE

Sonata Software is an AI-first modernization engineering company that helps enterprises transform legacy systems into intelligent, scalable business platforms. Powered by its Platformation ™ framework and Harmoni.AI platform, Sonata delivers AI-led modernization across cloud, data, AI, Dynamics, test automation, and managed services. Headquartered in Bengaluru, India, Sonata has more than $1.2 billion in revenue and 6,400+ AI engineers supporting global delivery across regions including the US, UK, India, Malaysia, Mexico, Australia, DACH, and the Nordics. With deep partnerships across Microsoft, AWS, Salesforce, and Snowflake, Sonata helps Fortune 500 enterprises accelerate innovation, improve efficiency, and drive sustainable growth.