Use a strong password to open the document
Restrict editing with password protection
Mark the document as final
Set document permissions
Limit copying, printing, and editing
Encrypt the document
Remove hidden metadata and personal information
Save a backup copy in a secure location
Use OneDrive or SharePoint access controls
Enable version history and recovery options
Apply digital signatures
Restrict access to trusted users only
Keep Microsoft Word updated
Scan the file for malware before sharing
