Jeevanantham S
Chennai,Tamilnadu
Summary
Open for challenging opportunities in Messaging Administration where my experience and skills can be used to achieve efficient, cost effective, and reliable solutions to technical requirements and problems.
Overview
1
1
Certification
8
8
years of professional experience
Work History
Senior Associate Engineer
Centric Brands
Chennai
02.2026 - Current
- Total 7 years of IT experience.
- 5 years of experience and troubleshooting on Exchange Server 2016 and Microsoft 365 messaging services.
- 2 years of experience as a System Administrator.
- Automated mailbox storage monitoring using PowerShell scripts to track quota usage and notify users at defined thresholds, helping prevent mailbox capacity issues and service disruptions.
- Administer and maintain Microsoft 365 services including Exchange Online, SharePoint Online, Microsoft Teams, and OneDrive for Business.
- Manage Exchange Online activities such as mailbox provisioning, mail flow configuration, and security policy management.
- Perform user lifecycle management including onboarding, offboarding, license assignment, and access management.
- Implement and support MFA and Conditional Access policies to strengthen organizational security.
- Performed mailbox management and issue resolution using PowerShell, including mailbox permissions, mail trace analysis, distribution group management and user access troubleshooting.
- Create and manage SharePoint Online sites, permissions, access governance, and site administration activities.
- Troubleshoot complex issues related to SharePoint issues, site synchronization, email delivery authentication, Teams integration, and OneDrive sync.
- Manage Shared Mailboxes, Distribution Lists, and Proofpoint email security policies.
- Manage internal and external mail flow configurations in Exchange Online, ensuring seamless email communication and delivery.
- Configure and maintain Proofpoint email security policies including mail routing rules and external email flow policies to enhance email security and delivery efficiency.
- Coordinate and guide regional onsite technicians for issue resolution and operational support.
- Create Required and Available application groups for existing packages in Microsoft Intune to publish applications through Company Portal.
- Maintain 100 Percent SLA compliance through timely incident resolution and proactive support activities.
- Resolve email delivery failures by analyzing and correcting SPF, DKIM, and DMARC record misconfigurations, ensuring proper email authentication and restoring mail flow in Exchange Online.
- Create SOPs and Knowledge Base (KB) articles for Microsoft 365 and EUC-related issues to improve troubleshooting efficiency.
- Prepared weekly client presentations related to Windows vulnerabilities, patching status, and security updates.
- Created monthly reports and PowerPoint presentations for overall EUC ticket analysis and operational metrics.
Office 365 Administrator
INFOSYS
07.2023 - 01.2026
- Worked on incidents and tasks.
- Resolved customer-related problems and developed responses to customer service requests.
- Troubleshot Outlook and calendar-related issues.
- Troubleshot shared mailbox and resource mailbox issues.
- Troubleshot SharePoint end-user issues.
- Troubleshot issues related to OneDrive and PowerApps.
- Troubleshot synchronization and failed batch issues.
- Troubleshot end-user reported issues.
- Coordinated with Microsoft engineers on migration-related issues.
- Prepared PowerShell scripts for automation.
- Possessed knowledge of Exchange Server security, including user accounts, shared calendars, distribution lists, and Outlook Web Access (OWA).
- Provided day-to-day on-call support in an Exchange environment.
- Troubleshot issues related to SharePoint and Google applications.
- Troubleshot issues related to Skype for Business and Microsoft Teams.
- Troubleshot shared drive access issues.
- Troubleshot email delivery issues by analyzing message headers, TLS details, and Proofpoint message logs.
- Resolved false positives and false negatives by adjusting anti-spam thresholds, managing whitelists and blacklists, and tuning rules.
- Identified root causes of blocked or quarantined emails using Verdict Details and filtering policies.
- Diagnosed URL Defense and Attachment Defense blocks by reviewing rewritten links and sandbox verdicts.
- Addressed outbound mail blocks caused by DLP triggers, rate limits, or spam detection.
- Validated and corrected SPF records during mail authentication failures.
- Assisted end users with quarantine releases, message restores, and End User Digest access issues.
- Troubleshot directory synchronization issues by checking Active Directory and Azure Active Directory integration and sync configurations.
- Reviewed system health, including appliance resource usage, queue delays, and network connectivity issues.
- Coordinated with Proofpoint support teams during outages by logging vendor tickets and working closely with them until full resolution.
Office 365 Administrator
INFOSYS
09.2022 - 07.2023
- Worked on incidents and service requests.
- Resolved customer-related issues and developed responses to customer service requests.
- Troubleshot Outlook and calendar-related issues.
- Troubleshot shared mailbox and resource mailbox issues.
- Troubleshot SharePoint end-user issues.
- Troubleshot issues related to OneDrive and PowerApps.
- Troubleshot synchronization and failed batch issues.
- Troubleshot end-user reported issues.
- Troubleshot issues related to cloud shared drives.
- Reviewed message tracking logs to determine whether emails were delivered, deferred, bounced, or dropped by the ESA.
- Diagnosed mail delays by analyzing queue status, performance graphs, and system resource utilization on the ESA.
- Coordinated with Cisco TAC for escalations during outages or complex ESA operational issues.
- Performed patch management and server reboots.
- Worked on server critical alerts and major incidents (MIs).
- Troubleshot SSO and MFA issues.
- Troubleshot license-related issues.
- Troubleshot issues related to SailPoint and Microsoft Entra.
O365 Administrator
Servion Global Solutions
01.2021 - 03.2022
- Worked on incidents and tasks.
- Resolved Exchange-related incidents across the messaging environment and handled service tasks.
- Managed day-to-day administration and troubleshooting of Exchange Server 2016 and Microsoft 365 messaging services.
- Created and managed Outlook mailboxes, shared mailboxes, and distribution groups in the Microsoft 365 portal, including user and group assignments.
- Increased mailbox quotas and configured online archives, including archive mailbox size expansions.
- Maintained user accounts and group memberships in the Azure Active Directory portal, including updates to user information.
- Restored deleted user accounts and data from Azure Active Directory.
- Assigned Microsoft 365 licenses based on user designation and department-specific shared mailbox requirements (Servion, Acqueon).
- Performed Outlook backups and PST exports using Compliance Management / Content Search for exited users and supported OneDrive configuration.
- Maintained SharePoint Online user data for new joiners and exited users.
- Analyzed spam confidence levels, performed message tracing and URL tracing, and blocked malicious email addresses and domains.
- Configured and managed mail forwarding between mailboxes.
- Installed, configured, and troubleshot Cisco VPN connectivity issues.
- Installed and supported Servion-licensed applications.
- Used the IssueTrak ticketing tool to manage incidents, assign tickets to relevant teams, and handle Level-1 network support calls when required.
- Configured and troubleshot virtual machines (VMs).
- Installed and troubleshot Symantec Endpoint Protection and Cisco AMP.
- Utilized TeamViewer and SCCM for remote support and system management.
- Administered Active Directory, including user and OU creation, account unlocks, and BitLocker recovery key retrieval.
- Troubleshot Wi-Fi and LAN connectivity issues.
- Installed, hardened, and maintained Windows 7 and Windows 10 operating systems, including system upgrades.
- Provided printer and scanner support for end users.
- Managed Windows maintenance, including dual-boot configurations, upgrades, and updates.
- Configured TCP/IP settings and supported internet connectivity maintenance.
- Deployed patches to client laptops and servers using the BigFix tool.
- Managed the Cloud App Security dashboard, investigating and resolving cloud application incidents.
- Maintained the Microsoft Defender dashboard, allowing and blocking applications through Intune policies.
- Deployed, updated, and managed applications via Microsoft Intune.
Remote Desktop Support Engineer
Mindtree
12.2019 - 07.2020
- Installed and configured Windows operating systems remotely for end users.
- Resolved customer-related issues and developed appropriate responses to service requests.
- Provided expert network troubleshooting and technical solutions to ensure optimal connectivity and performance.
- Configured and implemented remote access solutions, including SCCM, for system management and support.
- Monitored service quality through daily interaction with end users to troubleshoot and resolve technical issues.
- Dynamic and resourceful Desktop Support professional, recognized for delivering high-quality technical support across various desktop operating systems.
- Worked within a Service Management ticket queue, ensuring high-priority incidents were addressed promptly.
- Performed additional duties as assigned by the manager.
- Collaborated with the Desktop Support team to ensure security posture and compliance standards were maintained.
- Performed team evaluations to ensure consistent, high-quality support delivery to customers.
- Assisted with training material development and supported training initiatives when required.
- Installed, upgraded, and verified hardware and software applications.
- Assisted end users in adopting new and existing technologies, providing one-on-one coaching and training.
- Managed laptops, desktops, and printers across the organization.
- Trained and worked on Wintel, Networking, Citrix, and VMware technologies.
- Demonstrated strong technical support expertise with a customer-focused approach.
- Exhibited excellent analytical, problem-solving, and troubleshooting skills.
- Maintained a poised and patient demeanor when interacting with clients.
- Installed and configured software, tested customer PCs, and analyzed the functionality of peripheral devices.
Desktop Support Engineer
Wipro
06.2018 - 12.2019
- Handled IT-related tickets (incidents, service requests, events) from users received via phone, email, and the ticketing tool.
- Responsible for supporting corporate Circle Head employees, including Vice Presidents and Circle Heads.
- Supported ~300 users locally and remotely, including one dedicated corporate location.
- Acknowledged tickets and assigned appropriate categories.
- Logged and classified tickets based on severity and impact.
- Communicated pertinent updates on incidents and progress to stakeholders as needed.
- Provided Level 1 support for end-user issues related to enterprise applications, operating systems, printing, Office productivity tools, and general IT queries.
- Ensured activity details were updated in the tool by the respective support groups.
- Routed calls to third-party suppliers for issues within their agreed scope.
- Configured and troubleshot Lotus Notes 8.5 and Office 365 client.
- Performed network operations availability monitoring, daily network management schedule compliance, coordinated with vendors for network escalations, and maintained network documentation.
- Installed and maintained Windows 7/8/10 Professional and application/office automation software.
- Configured networks and shared printers, passbook printers, scanners, and Omni scanners.
- Troubleshot SCCM, Nevis, and Symantec Antivirus issues.
- Installed and troubleshot VPN configurations.
- Conducted frequent branch visits and infrastructure audits.
- Created and maintained the asset database and tagged assets with unique codes.
- Created troubleshooting guides for the Service Desk for common Active Directory incidents (e.g., user IDs, group IDs, generic IDs, shared folder access).
- Troubleshot user ID issues, including time restrictions, ID extensions, account creation, and account lockouts.
Education
MCA -
Anna University – ARS Engineering College
B.Sc. - Computer Science
University of Madras – Pattammal Alagesan College of Arts & Science
HSC -
State Board – Higher Secondary School
SSLC -
State Board – Higher Secondary School
Skills
- Microsoft 365
- Exchange Online
- SharePoint Online
- Microsoft Teams
- OneDrive for Business
- Microsoft Outlook
- Identity & Security
- Microsoft Entra ID
- Azure AD
- Active Directory
- Multi-Factor Authentication (MFA)
- Role-Based Access Control (RBAC)
- Compliance & Governance
- Microsoft Purview
- Retention Policies
- Audit Logs
- EDiscovery
- Endpoint & Device Management
- Microsoft Intune
- Remote Desktop Services (RDS)
- End User Computing (EUC) Support
- Windows Troubleshooting
- PowerShell
- Email Security & Messaging
- Proofpoint
- Mail Routing
- External Mail Flow
- SPF
- DKIM
- DMARC
Certification
- AZ 500 Infosys Certified
- AZ 900 Infosys Certified
- Copilot Infosys Certified
- Infosys Certified Exchange Server 2013 Administrator
- Infosys Certified Microsoft 365 Security and Compliance Administrator
- Android Certified Developer
- CCNA - CMS Institute of Technology
Timeline
Senior Associate Engineer
Centric Brands
02.2026 - Current
Office 365 Administrator
INFOSYS
07.2023 - 01.2026
Office 365 Administrator
INFOSYS
09.2022 - 07.2023
O365 Administrator
Servion Global Solutions
01.2021 - 03.2022
Remote Desktop Support Engineer
Mindtree
12.2019 - 07.2020
Desktop Support Engineer
Wipro
06.2018 - 12.2019
MCA -
Anna University – ARS Engineering College
B.Sc. - Computer Science
University of Madras – Pattammal Alagesan College of Arts & Science
HSC -
State Board – Higher Secondary School
SSLC -
State Board – Higher Secondary School