Microsoft 365 Architect

About the role

The M365 Architect owns the endtoend design authority for the customers Microsoft 365 estate across collaboration messaging content services compliance and lowcode automation The role is accountable for architecture decisions design documentation standards and governance and for driving L3 escalations that require designlevel intervention This is a clientfacing onsite role that partners with the customers IT leadership security and infrastructure teams and leads the offshore L3 engineering pod

Responsibilities

• Own the targetstate architecture for Exchange Online and onpremises hybrid SharePoint Online OneDrive for Business Teams filecollaboration integration Power Platform and Purview
• Produce and maintain HLDLLD design decision records asbuilt documentation standards and reference patterns secure client architecture review board approval
• Define tenant configuration baselines governance guardrails and lifecycle policies for sites teams groups guests and external sharing
• Assess and remediate technical debt legacy Exchange servers public folders unsupported clients orphaned sites oversized OneDrive estates
• Conduct design reviews and provide signoff on changes classified as highrisk or architecturally significant
• Design and govern hybrid Exchange topology mail routing connectors Autodiscover freebusy and crossforest coexistence
• Own mail hygiene and transport architecture Exchange Online Protection Defender for Office 365 policies antispamantiphish transport rules journaling
• Design and govern SPF DKIM and DMARC records and enforcement posture across all sending domains including thirdparty senders
• Own applicationrelay mail architecture including SendGrid domain authentication dedicated IPs subuser and API key model suppression lists deliverability and bounce management IP warmup and reputation monitoring
• Own enterprise email signature and disclaimer management through Exclaimer template design AD attribute mapping campaign banners rules by departmentregion and integration with Exchange Online transport or clientside deployment
• Define mailbox provisioning standards sharedresource mailbox models retention and archiving including migration off legacy archive platforms
• Architect SharePoint Online information architecture hubsite topology navigation metadata search content types and term store
• Design fileshare and legacy SharePoint onpremises migration strategy and tooling ShareGate Migration Manager Mover including sizing throttling cutover and validation
• Define OneDrive Known Folder Move sync client policy storage quotas retention on leaver accounts and offboarding data handling
• Define permissions model sharing controls sensitivitylabel driven site protection and access review process
• Design and implement sensitivity labels and autolabelling DLP policies across Exchange SharePoint One