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# Microsoft 365 Messaging & Collaboration SME

- **Company:** Proactive Appointments
- **Location:** United States
- **Experience:** Experienced
- **Contract:** Permanent contract
- **Skills:** Microsoft Windows, Cyber Security, Data Security, Domainkeys Identified Mail, Domain-Based Message Authentication Reporting and Conformance (DMARC), Domain Name System (DNS), Email Filtering, Simple Mail Transfer Protocols, Microsoft Office, Windows PowerShell, Azure Active Directory, Anti-Phishing, Zero Trust Network Access, Microsoft SharePoint, Azure Automation, Microsoft Power Automate, Office365, Microsoft InTune, Sender Policy Framework (SPF), 3-tier Architectures
- **Published:** November 6, 2026
- **Apply:** https://computerjobs.com/us/en/mob/job/531753A71827A8B3C5

## About the Role

* Minimum 5 years' experience engineering and supporting Microsoft 365 environments.
 * Strong hands-on experience with Exchange Online administration and troubleshooting.
 * Extensive Microsoft Teams configuration and support experience.
 * Practical experience with Microsoft Purview, including DLP and compliance policies.
 * Experience with Microsoft Defender for Office 365 and Exchange Online Protection.
 * Knowledge of enterprise email security platforms, ideally Proofpoint.
 * Experience supporting Exchange Hybrid environments and migrations.
 * Good understanding of Microsoft Entra ID and Conditional Access.
 * Experience with Microsoft Intune.
 * Strong PowerShell Scripting and automation skills.
 * Experience using Microsoft Graph.
 * Good understanding of SMTP, DNS, SPF, DKIM and DMARC.
 * Proven experience providing Tier 3 support within enterprise environments.

Desirable Experience

 * Microsoft 365 Copilot implementation and readiness.
 * Teams Telephony.
 * SharePoint Online and OneDrive administration.
 * Azure Automation and Logic Apps.
 * Microsoft Power Platform.
 * Zero Trust security initiatives.
 * Global or multi-tenant Microsoft 365 environments.
 * ITIL service management and Agile delivery.

## Description

This is an excellent opportunity for a hands-on Microsoft 365 specialist with strong experience across Exchange Online, Microsoft Teams, Microsoft Purview and enterprise email security solutions.

You will be responsible for engineering, maintaining and improving business-critical messaging and collaboration services, providing advanced technical support and delivering platform enhancements across a complex enterprise environment.

We are looking for someone who enjoys working hands-on with technology, resolving complex issues and acting as a technical subject matter expert., * Engineer, configure and maintain Microsoft 365 messaging and collaboration services.

 * Administer and support Exchange Online, including mail flow, transport rules, shared mailboxes and permissions.
 * Configure, maintain and troubleshoot Microsoft Teams.
 * Support Exchange Hybrid environments, migrations and tenant optimisation.
 * Implement platform improvements and new Microsoft 365 capabilities.

Security & Compliance

 * Manage Microsoft Defender for Office 365, Exchange Online Protection and Proofpoint.
 * Configure email security, anti-spam, anti-phishing and threat protection policies.
 * Support Microsoft Purview, including DLP, Information Protection, Retention and eDiscovery.
 * Maintain email authentication standards, including SPF, DKIM and DMARC.
 * Work with Cyber Security teams to improve Microsoft 365 security and compliance.

Technical Support & Operations

 * Provide Tier 3 technical support and act as an escalation point for complex issues.
 * Troubleshoot Exchange Online, Teams, mail flow and email security incidents.
 * Perform root cause analysis and implement permanent solutions.
 * Monitor service performance, availability and platform health.
 * Support incident, problem and change management.
 * Maintain technical documentation and operational procedures.

Automation & Improvement

 * Develop PowerShell scripts to automate Microsoft 365 administration.
 * Use Microsoft Graph and administration tools to improve operational efficiency.
 * Identify opportunities for automation and service improvement.
 * Support Microsoft 365 Copilot readiness and emerging technologies.