Z3_Exchange Online (EXO) Specialist

Req ID: 363346 

NTT DATA strives to hire exceptional, innovative and passionate individuals who want to grow with us. If you want to be part of an inclusive, adaptable, and forward-thinking organization, apply now.

We are currently seeking a Z3_Exchange Online (EXO) Specialist to join our team in Bengaluru, Karnātaka (IN-KA), India (IN).

Designation – Exchange Online (EXO) Specialist:
The EXO Specialist at Client will lead the architecture, governance, modernization, and
lifecycle management of the Global Exchange Online (EXO) and Hybrid messaging environment.
The role ensures seamless collaboration between cloud and on-prem systems, supports largescale mailbox migrations, enforces security and compliance standards, and partners with global
teams across Germany, India, and NAFTA regions.
The organization operates a mixed landscape of Exchange Online, Exchange on-premises, hybrid
mail flows, multiple Microsoft 365 tenants, and complex security/compliance controls—requiring
advanced architectural ownership.
Key Responsibilities:
• Design and maintain the global EXO and Hybrid architecture, aligning with
Client security, compliance, and M365 tenant strategies.
• Define scalable architectures for mailbox serves, transport services, client access, and
application integrations.
• Govern authentication modernization (OAuth2, Graph API) in response to Microsoft
deprecations such as EWS retirement.
• Establish EXO governance models, role definitions, and admin access control frameworks
in alignment with security & compliance teams
• Oversee hybrid configuration (Exchange On-Prem + EXO), ensuring stability of
provisioning flows, directory synchronization, and mail routing.
• Support and coordinate large mailbox migrations, including pool-ID migrations and
workload transitions mandated by MBAG timelines.
• Lead issue resolution involving EXO team, Microsoft support, and internal stakeholders
across ITT/IT, EXO-Migration teams, and business application owners.
• Implement and optimize EXO security baselines, modern authentication, forwarding
restrictions, and audit controls as mandated by corporate guidelines.
• Work with Contract Management to evaluate new licensing and security enhancements
such as Defender for Office features and E3/E5 add-ons.
• Ensure messaging compliance requirements are met across geographies (EU, India),
coordinating with MBAG legal, identity, and compliance teams.
• Lead upgrades of legacy app integrations from deprecated EWS to Microsoft Graph
before Microsoft deadlines
• Provide architectural guidance to application owners transitioning integrations into the
modern authentication ecosystem.
• Act as technical escalation point for EXO L2/L3 teams and external partners
• Ensure adherence to Client change management, ITSM processes, and global
operations frameworks.
Required Skills & Experience:
• 7–10+ years in Exchange/EXO architecture, including hybrid deployments in large
enterprises
• Deep expertise with Exchange Online, Exchange Server (2016/2019), AAD Connect,
Identity, OAuth, Graph API transitions.
• Experience managing cloud migrations in multi-tenant environments.
• Strong understanding of email security, EOP, Defender for Office, and regulatory
compliance in global organizations.
• Excellent communication, documentation, and collaboration skills
• Proactive mindset with a focus on continuous improvement and threat
prevention.
Certifications:
• Microsoft Certified: Messaging Administrator Associate
• Microsoft 365 Certified Enterprise Administrator Expert
• TOGAF / CISSP (advantage)
Key Deliverables:
• EXO architecture blueprints, hybrid topology designs, governance documentation.
• Migration runbooks, cutover plans, and application modernization guidelines.
• Security compliance mappings, design risk assessments, and audit evidence frameworks.
• Regular updates to EXO steering teams, architecture boards, and global governance
committees

About NTT DATA

NTT DATA is a $30 billion business and technology services leader, serving 75% of the Fortune Global 100. We are committed to accelerating client success and positively impacting society through responsible innovation. We are one of the world's leading AI and digital infrastructure providers, with unmatched capabilities in enterprise-scale AI, cloud, security, connectivity, data centers and application services. our consulting and Industry solutions help organizations and society move confidently and sustainably into the digital future. As a Global Top Employer, we have experts in more than 50 countries. We also offer clients access to a robust ecosystem of innovation centers as well as established and start-up partners. NTT DATA is a part of NTT Group, which invests over $3 billion each year in R&D.

Whenever possible, we hire locally to NTT DATA offices or client sites. This ensures we can provide timely and effective support tailored to each client’s needs. While many positions offer remote or hybrid work options, these arrangements are subject to change based on client requirements. For employees near an NTT DATA office or client site, in-office attendance may be required for meetings or events, depending on business needs. At NTT DATA, we are committed to staying flexible and meeting the evolving needs of both our clients and employees. NTT DATA recruiters will never ask for payment or banking information and will only use @nttdata.com and @talent.nttdataservices.com email addresses. If you are requested to provide payment or disclose banking information, please submit a contact us form, https://us.nttdata.com/en/contact-us.

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