technical escalation point for complex Outlook, mailbox, calendar, authentication, connectivity and messaging policy issues.Support messaging-related Microsoft Entra application registrations, service principals, API permissions, OAuth and Microsoft Graph integrations.Ensure messaging-related application permissions follow least-privilege and established approval processes.Support approved messaging retention, legal hold, eDiscovery and compliance requirements … flow, connectors, transport rules, SMTP relay, authentication and Autodiscover.Strong Microsoft Outlook and mailbox troubleshooting capability.Experience with Microsoft Entra ID dependencies, application registrations, service principals, OAuth and API permissions relevant to messaging.Strong Exchange Online PowerShell skills and experience using Microsoft Graph or comparable APIs.Experience leading major incidents, problem management and root ...