Most SharePoint migrations fail before they start because teams skip the assessment phase. Know your data, users, structure, and goals first to avoid chaos, poor adoption, and wasted money. Assess before you migrate — it’s the real foundation for success.

Microsoft Defender may quarantine internal emails with blocked SHA256 file hashes, overriding allow lists. To avoid communication issues, regularly review and update Defender’s file hash policies in the Tenant Allow/Block List.