SharePoint 2016/2019 End-of-Support Migration Plan

Organizations still running SharePoint Server 2016 or 2019 should treat migration planning as more than a hosting upgrade. The real work is deciding what to move, what to modernize, what to archive, and what governance model will keep SharePoint Online healthy after go-live.

Start with inventory

A useful inventory includes farms, site collections, content databases, storage, workflows, forms, customizations, owners, active users, external sharing, records requirements, and business-critical processes.

Separate content by decision

Do not migrate everything by default. Classify content into active collaboration, archive, records, retire, rebuild, and hold categories. This reduces cost, risk, and post-migration clutter.

Validate the target tenant

SharePoint Online migration should align with Microsoft 365 identity, Teams, OneDrive, external sharing, retention, sensitivity labels, DLP, search, and support processes.

Pilot before broad waves

Pilot representative sites before moving the entire estate. Validate permissions, metadata, pages, workflows, forms, links, sync behavior, search, and user support requirements.

Plan hypercare

The migration is not finished when data lands. Schedule hypercare, owner support, help desk scripts, governance cleanup, and admin handover.