We are preparing to migrate a large SharePoint Online document library to another Microsoft 365 tenant, but I am concerned about files being skipped during the transfer. The library contains thousands of documents, nested folders, files with long names, and several items that have not been modified for years.
In a migration project, a completed job does not necessarily mean every item was transferred successfully. Some files may fail because of insufficient permissions, unsupported characters, destination restrictions, locked documents, or path-length limitations. API throttling and temporary connection issues can also interrupt large migration batches.
My first step would be to review the migration logs and identify the exact reason for each skipped or failed item. Instead of restarting the entire migration immediately, I would separate failed items into categories, resolve the underlying issues, and rerun the affected transfers where supported.
Another important check is whether the destination already contains files with identical names. Depending on the migration settings, existing files may be skipped, overwritten, or handled according to a conflict-resolution rule. Administrators should understand these behaviors before running the migration against production data.
I am also looking for a sharepoint migration tool that offers selective migration, filtering options, and useful progress reports. These features can make it easier to investigate failed transfers without manually checking every document.
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SysInfo Microsoft SharePoint Migration Tool is one solution worth evaluating for bulk SharePoint content migration. Before using it in production, I would test representative files, verify its handling of duplicate content, and confirm that the available logs provide enough detail to troubleshoot failed items.
For larger environments, businesses can also explore sharepoint migration services from SysInfo alongside its migration tool to discuss their migration requirements and technical challenges.
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