When planning a SharePoint tenant-to-tenant migration, I think the first question should be: exactly what needs to be moved? SharePoint environments can contain much more than ordinary documents. Sites may include document libraries, generic lists, folders, custom columns, metadata, and different versions of business files.

A migration plan should begin with an inventory of the source environment. Administrators can identify active sites, unnecessary content, large files, duplicate documents, and data that does not need to be transferred. This makes the migration more predictable and can reduce the amount of unnecessary data sent to the destination tenant.

If the requirement is to Migrate SharePoint to Office 365, site mapping becomes particularly important when multiple departments or business units are involved. A structured mapping between source and destination sites helps maintain organization instead of manually moving content without a defined destination.

I was also looking at the SysInfo SharePoint Migration Tool and found its filtering options useful for this type of scenario. Administrators can filter content using created or modified dates, file size, extensions, and content type. There is also an option to skip files that were already migrated, which can be useful when continuing a migration after an interruption.

Another challenge is duplicate content. SharePoint repositories can accumulate copies of the same document over time, especially in environments where several teams collaborate on similar files. A deduplication mechanism can identify redundant files and provide administrators with options for handling them rather than blindly transferring everything.

Authentication is another area worth testing before the production migration. Modern OAuth 2.0 authentication, Microsoft Graph API, and Entra ID app registration can provide a more current approach for connecting source and destination tenants.

The Microsoft SharePoint migration tool should also provide clear migration reporting. Progress information, skipped or failed items, applied filters, and completed tasks make it easier to verify what happened during the transfer.

For a large tenant migration, I would start with a small pilot involving representative sites, review the results carefully, and then gradually increase the migration volume. This approach can expose configuration or mapping problems early rather than discovering them after the entire SharePoint environment has been transferred.

Read More: https://www.sysinfotools.com/blog/migrate-sharepoint-to-office-365/