Hands-on administration of Microsoft 365 and Microsoft Entra ID across multiple tenants, including Exchange Online, SharePoint Online, Teams, OneDrive, Defender, Intune, licensing, permissions, groups, Conditional Access, and Multi-Factor Authentication. This role carries client issues from Level 1 triage through Level 2 resolution to Level 3 root-cause analysis across Microsoft 365, Microsoft Entra ID, endpoints, networking, and security, escalating only substantial issues requiring additional support.