Exchange 2013 and 2016 have both crossed their end-of-support dates. If your organization is still depending on either of these versions, you are essentially running email infrastructure that Microsoft no longer protects. No security fixes, no compliance updates, and a growing list of risks that your IT team has to absorb quietly.

The question is no longer whether to migrate. The question is how to do it without disrupting the business.

Start with a proper inventory. Before touching any configuration, map out every mailbox, shared account, public folder, and archive that exists on your current server. Organizations that skip this step almost always discover surprises mid-migration, and surprises at that stage are expensive.

Next, decide on your migration approach. A staged migration works better for larger environments because it spreads the load across multiple batches and gives your team time to validate each group before moving on. A cutover migration can work for smaller setups, but it demands tight coordination and a reliable rollback plan.

Tooling makes or breaks the entire process. Shoviv Exchange Migrator is built specifically for scenarios like this. It connects directly to your Exchange 2013 or 2016 environment and moves mailboxes, archives, and public folders to Office 365 without requiring PowerShell expertise or complex manual configurations. The delta migration feature is particularly useful because it syncs any changes made during the migration window, so nothing falls through the gap between your start date and go-live date.

Once migration is complete, test thoroughly before you shut down the old server. Spot-check mailboxes, verify calendar data, confirm contacts transferred correctly, and make sure shared mailboxes are accessible.

Migrating off a legacy Exchange server is one of the more impactful infrastructure decisions an IT team makes. Do it with a clear plan and a tool that handles the complexity, and it becomes one of the smoothest transitions your organization will go through.

Read Related Blogs:

https://www.shoviv.com/blog/migrate-shared-mailbox-to-microsoft-365-exchange-online/
https://www.shoviv.com/blog/migrate-exchange-2010-to-2016-using-exchange-admin-center/
https://www.shoviv.com/blog/perform-bulk-mailbox-migration-to-office-365/
https://www.shoviv.com/blog/tenant-to-tenant-migration/