Microsoft 365 Backup - Restore Experience and Reliability Questions

Your restore tests expose two different questions: available recovery granularity and whether reported job status matches the actual outcome. Current Microsoft documentation includes an Exchange Selected content only option, with filters such as sender, recipient, subject, and time range. It supports granular recovery of matching content, limited to 1,000 items per operation, rather than requiring an unrestricted mailbox restore. Both new-folder and in-place destinations are documented. For the OneDrive ten-hour failure, and SharePoint jobs marked failed despite recovered files, capture the restoration task identifiers, restore points, destinations, affected item counts, and timestamps. Verify recovered versions and completeness rather than treating visible files as proof that the whole job succeeded. Raise those discrepancies with Microsoft support; the symptoms alone do not establish a known product defect. During evaluation, observe Microsoft’s testing guidance of no more than two test restores monthly per protection unit