Aditya Thumburu

M365 Administrator with 5+ years of experience in Exchange Online, Teams, Teams Voice & Telephony, SharePoint, OneDrive, Entra ID and PowerShell. Skilled in configuring transport rules, retention policies, DLP policies, managing mail flow and email security. Proven success in implementing Teams Calling solutions across US, UK, India Offices Supporting 1500+ users, Desk Phones & Video Conferencing Devices.

Sr. Infra Developer at Cognizant Technology Solutions (2024-12 – Present)

Technical Analyst at BA Continuum India Pvt Ltd (2021-07 – 2024-11)

• Provided end-to-end support for M365 applications including Outlook (Classic/New), OWA, Teams, Excel, Word, PowerPoint, and OneNote.
• Created and managed Exchange Transport Rules for external email warnings and domain-based restrictions.
• Configured Alert Policies to monitor mail loops and coordinated with mailbox owners for resolution.
• Created and managed DLs, DDLs, Mail-Enabled Security Groups for permissions, M365 Groups, and Dynamic Groups for group-based license management.
• Troubleshooting quarantined email issues by validating SPF, DKIM, DMARC records and modifying anti-spam policies & Exchange Transport Rules.
• Troubleshooting mail flow issues using Exchange Message Trace, Message Header analysis, and NDR Analysis.
• Managed SMTP Servers & worked on SMTP mail flow issues by checking Connectors, clearing mail queues, restarting relay services, and analyzing mail traces.
• Managed Data Loss Prevention (DLP) policies and created sensitivity labels, assigning them to users in alignment with business and compliance requirements.
• Created and managed retention policies to ensure compliance, enabling archiving of user mailboxes and shared mailboxes as per business requirements.
• Configured Room Mailboxes, Room Lists, booking policies, and delegates, while troubleshooting related issues.
• Synchronizing the On-Prem Active Directory with the Microsoft Entra using Microsoft Entra Connect and troubleshooting the issues related to synchronization failures using Synchronization manager and ID Fix.
• Implementing the safe attachment policies and safe links emails over the exchange workloads.
• Conducting Attack Simulation Trainings like Spear phishing attacks and Drive-by URL attacks and educating the end users regarding the phishing attacks.
• Performed Weekly M365 license cleanup and optimized SharePoint storage by monitoring storage and performing version cleanup with PowerShell Scripts.
• Created external sharing SharePoint sites, managed guest access, and Performed quarterly SOX audits.
• Raising Automation ideas, highlighting risks while accessing M365 products and working with our Engineering team for implementation.
• Acquired phone numbers from Microsoft Calling Plan and Operator Connect, assigned them to users, and configured emergency addresses for E911 Calling.
• Enabled Teams apps and managed permissions using Mail-Enabled Security Groups, and pinned apps directly to users' Teams clients for easy access using Teams App Setup Policies
• Analysing Teams call logs for resolving call quality / call drop issues and troubleshooting E911 address routing issues.
• Monitored VC Rooms / Common Area Phones through alerts when they go offline and worked with local IT for getting them back Online. Pushed the VC Rooms updates through Teams Admin Center.
• Implementing shared calling in Microsoft Teams for 150 users and 20 Polycom voice/video devices, optimizing license usage and reducing phone number costs.
• Created and utilized Call Quality Dashboard (CQD) for monitoring and improving Teams call performance.
• Configured paging in Teams using Direct Routing and Dial Plans, performed server TLS certificate renewals.
• Configured E911 calling by whitelisting public IPs, adding subnets, creating emergency addresses, and assigning them to phone numbers for respective office buildings.

Bachelor of Technology in Computer Science and Engineering – SRM Institute of Science and Technology (2017 – 2021)

Intermediate / 12th Class in MPC – Narayana Junior College (2014 – 2016)

SSC / 10th Class – Karthikeya Concept School (2013 – 2014)