We are looking for a professional with 5–8 years of hands-on experience in the following areas and willingness to work in a 24x7 support setup: Primary Responsibilities: Administration and management of Exchange Online, Microsoft Teams, Mimecast Email Security Gateway, Enterprise Vault, PST Migration, and Smart Tap. Manage and administer Exchange Server 2016 and 2019, including: Maintenance of on-premise Exchange servers, Adding servers to relay, Troubleshooting email queue issues and performing message tracing, Apply monthly patches and fix vulnerabilities on on-prem Exchange servers. Handle certificate renewal, installation, and configuration. Perform Exchange Online tasks such as: Message tracing and creation of transport rules, Enabling online archiving for users, Mailbox migration from on-prem to Exchange Online, Troubleshooting mailbox and distribution list issues, Managing user, resource, and shared mailboxes, License validation via the O365 portal. Handle licensing activities, including: Processing license requests, Communicating with stakeholders for new license procurement, Geo-licensing validation and mailbox migration based on geography (Teams, Groups, OneDrive). Microsoft Teams Administration: Create and configure Teams groups, Setup and configure Auto Attendants, Call Queues, and Resource Accounts, Configure Direct Routing and Federation with external partners. Mimecast Administration: Policy creation and user management (allow/block), Email release, tracing, and inter-unit user migration. Additional Responsibilities: Troubleshoot OneDrive sync issues, Manage external sharing for Teams sites, Perform and support PST migrations. Required Skills: Exchange On-Premise / Hybrid, Windows Server, Microsoft 365 Suite, Google Workspace.