Office Administrator

Walk In Drive on 08-Aug-2026 at Chennai , Tata Consultancy Services, SIPCOT Information Technology Park, Navalur Post, Siruseri, Chennai, Tamil Nadu, 603103. 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.