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Microsoft 365 Architect | Exchange Online | Intune | Entra ID | Defender | Purview Helping businesses securely migrate, manage, and optimize Microsoft 365 environments. Hello, I'm Kesavan, a Microsoft Certified Microsoft 365 and Security Specialist with experience helping organizations modernize their IT environments using Microsoft technologies. I work with businesses of all sizes, from small organizations to enterprise environments, delivering secure, reliable, and scalable Microsoft 365 solutions. My focus is helping clients improve security, simplify administration, strengthen compliance, and maximize the value of their Microsoft 365 investment. Services I Provide Microsoft 365 Deployment, Administration & Migrations • Microsoft 365 tenant setup, configuration, and management • Exchange Online, Microsoft Teams, SharePoint Online, and OneDrive administration • Migrations from Exchange Server, Google Workspace, GoDaddy, Zoho, and other platforms • User onboarding, licensing, and Microsoft 365 optimization Microsoft Intune & Endpoint Management • Microsoft Intune deployment and configuration • Windows Autopilot implementation • Device compliance and security policies • Mobile Device Management (MDM) and Mobile Application Management (MAM) • Application deployment and endpoint security management Identity & Access Management • Microsoft Entra ID (Azure AD) • Multi-Factor Authentication (MFA) • Conditional Access Policies • Privileged Identity Management (PIM) • Hybrid Identity and Azure AD Connect Security & Compliance • Microsoft Defender for Endpoint, Office 365, and Defender XDR • Microsoft Purview Information Protection and Data Loss Prevention (DLP) • Sensitivity Labels, Retention Policies, and Compliance Solutions • Security Assessments and Microsoft Secure Score Improvement • Security hardening and best-practice implementation Technical Support & Consulting • Microsoft 365 troubleshooting and administration • Exchange Online mail flow and migration support • Teams, SharePoint, and OneDrive support • Security and compliance consulting • Ongoing Microsoft 365 managed services Why Clients Work With Me ✔ Microsoft Certified Professional with expertise across Microsoft 365, Security, Identity, and Compliance ✔ Proven experience delivering migration, security, and endpoint management projects ✔ Strong focus on security, reliability, and business outcomes ✔ Clear communication, responsive support, and professional project delivery ✔ 100% Job Success Score with successful project delivery across multiple industries Certifications • MS-102 – Microsoft 365 Certified: Administrator Expert • SC-300 – Microsoft Certified: Identity and Access Administrator Associate • SC-400 – Microsoft Certified: Information Protection Administrator Associate • SC-401 – Microsoft Certified: Information Security Administrator Associate • MS-700 – Microsoft Teams Administrator Associate • MS-900 – Microsoft 365 Certified: Fundamentals Whether you need to migrate to Microsoft 365, strengthen security, deploy Intune, implement compliance controls, or optimize your existing environment, I can help you achieve a secure and efficient solution that supports your business goals. Let's discuss your requirements and build the right Microsoft 365 solution for your organization.

Senior System Administrator specializing in Microsoft 365, Active Directory, AWS, and enterprise infrastructure reliability. For the past 4 years, I've been the sole infrastructure consultant supporting production systems for Revalize LLC (USA), managing customer-facing enterprise environments where downtime directly impacts revenue. Alongside this long-term enterprise infrastructure ownership, I've delivered migration and remediation projects for 20+ organizations across SaaS, manufacturing, and professional services. Core expertise: - Microsoft 365 migrations & hybrid Exchange - Active Directory & Windows Server administration - AWS cost optimization & infrastructure reliability - PowerShell automation & process optimization - Disaster recovery & business continuity Clients typically bring me in when: → Migration projects have stalled or lack expertise → Active Directory or mail infrastructure becomes unstable → Production environments lack documentation or monitoring → Infrastructure costs are growing unexpectedly → Internal teams cannot safely troubleshoot production systems Recent project outcomes: → Migrated 500+ users from Exchange 2016 to Microsoft 365 with zero email downtime during 72-hour cutover → Reduced AWS infrastructure costs by 30% ($47K annually) through EC2 rightsizing and Reserved Instance strategy → Restored multi-site Active Directory replication affecting 450+ users across 3 locations within 8 hours → Recovered a non-booting domain controller with SYSVOL/DFSR failures in 6 hours, preventing an authentication outage → Automated user onboarding workflows, reducing provisioning time from 2 hours to 10 minutes Microsoft 365 & Exchange - Exchange Online & hybrid Exchange migrations - Tenant-to-tenant migrations - Hybrid identity (Entra ID / Azure AD) - SharePoint & Teams administration - SPF / DKIM / DMARC configuration - Intune device management & endpoint compliance policies - MFA enforcement, Conditional Access, and Microsoft 365 governance - Exchange sync troubleshooting & mailbox recovery Active Directory & Windows Infrastructure - Domain controller recovery & SYSVOL/DFSR replication repair - Multi-site domain controller deployments - Group Policy management & troubleshooting - FSMO role management & transfer - Hybrid AD environments (on-premises + Entra ID) - Windows Server 2012 R2 through 2022 administration AWS & Cloud Infrastructure - Cost optimization & infrastructure analysis (40-60% average reduction) - EC2 rightsizing & Reserved Instance strategy - RDS performance tuning & elastic pool optimization - CloudWatch monitoring & proactive alerting - VPC design & auto-scaling configuration Infrastructure Reliability & Operations - Disaster recovery planning & backup validation - Production change management & operational handoff - 24/7 emergency support for production infrastructure incidents - Flexible timezone coverage (US, UK, Australian business hours) Additional experience includes VMware vSphere, Hyper-V, Fortinet/pfSense networking, Veeam/Commvault backup solutions, and enterprise ITSM platforms including ServiceNow and JIRA. Certifications: → AWS Certified Solutions Architect – Associate → Microsoft 365 Certified: Fundamentals (2024) → MCSA: Windows Server 2016 → Fortinet NSE 1 & NSE 2 Network Security Clients value reliability, communication, and operational accountability just as much as technical execution. If you need an experienced infrastructure engineer to stabilize, migrate, optimize, or maintain production systems, send me: → Current infrastructure overview (platform, user count, pain points) → Project goals and timeline → Any existing documentation or error logs I respond within 24 hours with a project assessment and approach. Available for scheduled migrations, infrastructure remediation, and urgent production recovery engagements.

Expert in Email Configuration, Authentication & IT Systems Administration | 11+ Years Experience I am a highly skilled IT Systems Administrator with 11+ years of experience in email configuration, authentication, deliverability, domain management, and IT infrastructure. I specialize in setting up, managing, and troubleshooting business email systems, ensuring secure, high-deliverability email communication. 💡 Email System Configuration & Management ✔ Google Workspace (Gmail for Business), Microsoft 365 (O365), Zoho Mail and many other email platforms. ✔ Mailgun, SMTP, Postfix, Exim & Other Email Relay Services ✔ Transactional & Marketing Email Setup (Mailgun, SendGrid, Instantly.ai, Lemlist, etc.) ✔ Custom Email Domain Setup, Migration & Troubleshooting 🔐 Email Authentication & Security ✔ SPF, DKIM, DMARC Implementation & Optimization ✔ BIMI & MTA-STS Setup for Brand Protection ✔ Reverse DNS (PTR Records) & Dedicated IP Configuration ✔ SMTP Authentication & Secure Email Protocols (TLS, SSL) 🚀 Email Deliverability & Optimization ✔ Inbox Placement & Avoiding Spam Filters ✔ IP Reputation Monitoring & Blacklist Removal ✔ Domain Warm-up & Cold Email Best Practices ✔ Google Postmaster Tools & Microsoft SNDS Configuration 🌍 Domain Management, DNS Setup & Hosting Services ✔ Domain Registration & Transfer Management ✔ DNS Configuration (A, CNAME, MX, TXT, SRV, PTR Records) ✔ Hosting Setup & Migration (cPanel, Plesk, Cloudflare, AWS, etc.) ✔ CDN Integration & Performance Optimization 🖥️ IT Infrastructure & Systems Administration I also have deep expertise in IT systems administration, virtualization, and troubleshooting, including: ✔ Microsoft Windows Server (Setup, Management & Troubleshooting) ✔ Microsoft Hyper-V & VMware (Virtualization & Failover Clustering) ✔ WSUS (Windows Server Update Services) for Patch Management ✔ Linux OS Installation & Server Configuration ✔ Remote IT Support for Windows, Linux & VMware With my proven track record in IT infrastructure, email solutions, and domain management, I help businesses streamline operations, secure communication, and optimize system performance. 💬 Let’s discuss how I can improve your email setup, IT systems, and domain management!

I help businesses migrate, manage, and troubleshoot VMware, Proxmox, AWS, Windows/Linux servers, and network infrastructure. With 15+ years of hands-on IT experience, 6,700+ Upwork hours, and 100% Job Success, I specialize in: - VMware vSphere, ESXi, vCenter, Horizon, and Dell server administration - DELL NetApp SAN Storage Adminstration - VMware to Proxmox migration planning and execution - AWS server setup, troubleshooting, backup, and optimization - Windows/Linux server management, SSL, DNS, VPN, firewall, and network design - Documentation, monitoring, backup, and disaster recovery planning Clients hire me when they need a reliable senior engineer who can investigate quickly, explain clearly, and fix production issues with minimal downtime. Certifications include VCAP-DCV, VCP-DCV, VCP-NV, AWS SAA, CCNP, CCNA, Microsoft, Dell VxRail Deploy, and Dell PowerStore Deploy.

I am an experienced IT professional with over 10 years of hands-on experience and a flexible approach to work. Throughout my career, I have successfully completed numerous projects across different domains. Having worked for more than 3 years as a Network Engineer in a broadcasting company (Sports TV channel), I have also gained extensive expertise in live video production and post-production. I am proficient in media-related applications such as Adobe Premiere Pro, After Effects, Blender, vMix, Resolume Arena, and Aximmetry (Unreal Engine). Areas of expertise Firewalls Fortigate,Cisco ASA, Cisco Meraki, Draytek, MikroTik, Pfsense, IPCOP IPS: Snort, Suricata Email Gateways: Forti Mail, Symantec Bright Mail Gateway Storage : Synalogy, EMC, Thecus, HP SAN, Freenas, OpenFiler OS : Windows 2016 – 2008 R2, Redhat, Ubuntu Server, Centos, Windows 10 to 98 Servers : Active Directory, Windows and Samba File Servers, Web Server Apache IIS, DNS Servers, Zimbra mail Server, Terminal Server TSPLUS, Radius Servers, Networking : Cisco Routers Configurations, Cisco Switches Configurations, Configuring VPN IPsec Site to Site Video Production(Pre and Post); Adobe Premiere Pro, Adobe After Effects, vMix

✅ Self-motivated Linux Server Administrator and Network Administrator with more than 10+ years of working experience with different Cloud providers. Ready to take up any challenge. ✅ Expert on, 💎 AWS, Google Cloud, Azure, DigitalOcean or onPrem server management. 💎 Setting up and manage different environment Web Server, Database Server, Mail Server, Load Balancer, Optimization and Security. 💎 Designing Web Server - Building web server based on Apache, Nginx, Nginx/php-fpm, Varnish as backend with high performance tuning and major security issues. 💎 Learning Management Systems – Moodle (Expert) including mobile app (Android & Apple IoS) customization 💎 Document Management Systems – Nextcloud (Expert) and onlyoffice 💎 Security - Malware removal, server hardening using firewall rules, restriction in server login, Web security, Security auditing, fail2ban, mod_security for web attack, mod_evasive DDOS attack prevention, Firewall setup CSF, UFW and iptables. Prevention from mail attack, SSL Certificate installation. 💎 Database Server - Building MySQL, Mariadb database server with high performance , troubleshoot database server problems, tweaking MySQL variables for performance. 💎 Scripting - Bash Scripting for monitoring servers, auto backup. 💎 Mail server- Building mail server for sending and receiving mails postfix, sendmail, setup mail client Roundcube, SquirrelMail, Rainloop, Horde. Dovecot for POP & IMAP, troubleshoot mail issues, configure mail for delivery in inbox. 💎 Monitoring services and servers – LibreNMS, Nagios monitoring tools, tweaking as per requirement, monitor servers using bash script, Tripwire. 💎 Amazon - AWS EC2 server setup, Security. 💎 Cloud Servers & Panel - Management of Ubuntu, Centos, Cpanel, CWP, WHM, Plesk, Webmin, Diretadmin, ISPConfig, JustHost, Godaddy, Linode, Rackspace, Amazon. 💎 Migration - Server migration, website migration, database server migration, mail server migration. 💎 VOIP Solutions - Asterix based PBX (Eg: VitalPBX) 💎 Video conferencing - Zoom (including on premise setup), Jitsi, BigBlueButton 💎 Virtualization Technology - VMware VSphere Esxi, KVM, Xen Server 💎 Networking (CCNP R&S and SP certified) - Hands on experience with CISCO, HP, Extreme, Juniper devices including wireless. 💎 Firewall configurations - Hands on experience with Palo Alto, Check point and Cisco ASA firepower. ✅ Please do not hesitate to contact me to discuss your project in detail and determine how my skills will positively contribute to your team.