Office Administrator

Tata Consultancy Services · Chennai, India

Walk In Drive on 08-Aug-2026 at Chennai , Tata Consultancy Services, SIPCOT Information Technology Park, Navalur Post, Siruseri, Chennai, Tamil Nadu, .

Role : Messaging/O365 - Cisco E-mail Security Appliance

Experience: 4 to 8 Years

Location: Chennai

Must-Have

• Strong experience in Microsoft 365 Messaging Administration , including Exchange Online, Exchange Hybrid, and Exchange Server 2019.
• Hands-on experience administering and supporting Microsoft Exchange Online , mailbox lifecycle management, mail flow, transport rules, SMTP relays, and message tracing.
• Extensive experience managing Cisco Email Security Appliance (ESA) and Cisco Cloud Email Security (CES) platforms.
• Proven experience in Cisco ESA to CES migration projects , including planning, assessment, policy migration, mail flow redesign, implementation, testing, validation, and post-migration support.
• Strong knowledge of Email Security and Messaging Infrastructure , including SMTP, DNS, SPF, DKIM, DMARC, TLS, MX Records, and Autodiscover.
• Hands-on experience with Microsoft Entra ID (Azure AD) , Azure AD Connect, ADFS, SSO, MFA, Conditional Access, and Identity Management.
• Experience with Microsoft Teams, OneDrive for Business, SharePoint Online, and Collaboration Services Administration .
• Experience administering Microsoft Defender for Office 365 and email threat protection solutions.
• Experience with Microsoft Purview Compliance Portal , DLP, eDiscovery, Retention Policies, Content Search, and Compliance Management.
• Strong background in Incident Management, Problem Management, Change Management, and Root Cause Analysis (RCA) .
• Experience supporting P1/P2 critical incidents in a global enterprise environment.
• Hands-on experience working with PowerShell scripting and Exchange Online PowerShell for automation and administration.
• Experience using Microsoft Graph API for automation and administrative tasks.
• Experience managing and troubleshooting mail routing, email delivery, phishing, spoofing, and mail security incidents .